Germany FAG bearing temperature causes

FAG bearing temperature , generally bearing chamber outside temperature can be inferred that if the hole can be measured directly using the FAG Bearing outer ring temperature is more suitable position . Typically , FAG bearings with the bearing operating temperature began to rise slowly , 1-2 hours to reach steady state. The normal temperature because of the machine bearing the heat capacity , heat capacity, speed and load are different. If lubrication, install the appropriate department , the abrupt bearing temperature will rise , there will be an abnormally high temperature , time to stop running , take the necessary precautions. Thermal sensors can be readily monitored using FAG Bearing operating temperature , and to achieve the temperature exceeds the specified value to prevent automatic alarm or stop the burning shaft accidents. FAG bearings with high temperature often expressed in unusual circumstances . Temperature is harmful to the bearing lubricant . Sometimes bearing overheating can be attributed to the bearing lubricant . 

If FAG Bearing temperature over 125 ℃ even move to reduce long bearing life . FAG bearings caused by high temperature causes include : lack of lubrication or excessive lubrication, lubricant. Containing impurities, the load is too large, the bearing ring damage , lack of space , and produce high-friction seals and so on. Therefore, continuous monitoring of FAG bearing temperature is necessary , FAG bearings bearing measurements either by itself or other important parts . If the operating conditions remain unchanged in the case of temperature change can be said of any fault has occurred . FAG bearing temperature measurement by means of a regular thermometer, such as digital thermometers , bearing temperature can be accurately measured and determined in accordance ℃ or Fahrenheit units. Importance of FAG bearings , meaning when it is damaged , can cause equipment downtime , so this type of bearing temperature probe should preferably be installed . Under normal circumstances , FAG bearings lubricated or re-lubrication just after the temperature increase will be natural and continuous one to two days . Typically , the operating temperature of 150 ° or more bearings used in high-temperature bearings known as chromium bearing steel in use when the temperature exceeds 150 ° , a sharp decline in its hardness , dimensional instability, so that FAG bearings does not work. So for the working temperature of 150 ° to 350 ° work under conditions of FAG bearings , if the rings and rolling elements still use an ordinary high-carbon chromium bearing steel manufacturing, FAG bearing parts must be carried out on a special tempering treatment should generally be higher than the Operating Temperature 50 ° under tempering . After tempering according to the above requirements of the bearing steel , can be used in the normal operating temperature . But decreased hardness after tempering , 

FAG bearing life decreased. ( 1 ) Clean the heat treatment produced formation water, waste gas , waste salt , dust, noise and electromagnetic radiation etc. pollute the environment . Solution heat treatment of environmental pollution problems , the implementation of clean heat treatment ( also known as green heat treatment ) was developed heat treatment technology development directions. To reduce SO2, CO, CO2, emissions of dust and cinder has basically put an end to the use of coal as fuel , heavy fuel oil usage is less and less in favor of the majority of light oil , natural gas is still the ideal fuel . Furnace waste heat utilization has reached a high degree of structural optimization and the burner air - fuel ratio of the strict control of combustion to ensure reasonable premise , the NOX and CO is reduced to a minimum ; using a gas carburizing, carbonitriding and vacuum heat treatment technology to replace the salt treatment to reduce the waste salt and CN- containing toxic pollution of water sources ; using water-soluble synthetic oil instead of part of the quenching oil quenching , using biodegradable vegetable oil instead of mineral oil to reduce the portion of oil pollution . ( 2 ) Precision Precision heat treatment has two meanings : one is based on the requirements of parts , materials, structure size, the use of physical metallurgy knowledge and advanced computer simulation and testing technology, optimize the process parameters to achieve the required performance or maximize the potential of the material ; hand is fully optimized to ensure process stability , product quality dispersion is small ( or zero ) and heat treatment distortion zero. ( 3 ) the production of energy-saving heat and energy management science is the most efficient use of energy has the potential factors that establish a professional heat treatment plant in order to ensure full capacity , give full play equipment capacity is scientific management options. In the heat energy mix , preference primary energy ; make full use of waste heat , waste heat ; using low energy consumption, short cycle process instead of a long cycle , energy consumption and crafts. ( 4 ) less non-oxidation heat treatment by the use of protective atmosphere heating alternative oxidizing atmosphere is heated to precisely control the carbon potential , nitrogen potential of controlled atmosphere heat after heat treatment to improve the performance of parts , heat treatment defects such as decarbonization, cracks, etc. greatly reduced, heat treatment after finishing allowance reduced, improving the utilization of material and machining efficiency. Vacuum plus hot quenching, vacuum or low pressure carburizing , nitriding, nitrocarburizing and Boronizing etc. can significantly improve quality and reduce distortion , and increased life expectancy . FAG bearing parts heat treatment quality control in the whole machinery industry is the most stringent .

Code of rolling bearing

Codes of rolling bearings by basic codes, codes of front and rear codes, represented by letters and Numbers, etc. The composition of bearing codes are shown in table 9-2.

Note: (1), the basic code of one to five said below code from right to left the position of the ordinal number; Two (2), configuration code such as: / DB said bearing installed (figure 9 to 8 b), back to back/DF said two bearing installed (figure 9-8 a) face to face. 1, basic code consists of bearing inner code and combination code (combination code consists of bearing type code and size series code), used to indicate that the inner diameter of the bearing, diameter, width (or height series) and type, usually expressed in five digits or letters and Numbers, the points above are as follows:

(1) the bearing inner diameter with basic code right on the first and second digits, said such as table 9-3. Note: 1, * inside except for 22, 28, 32 mm; Bearing diameter less than 10 mm bearing code see bearing manual. 2, * * the quotient of nominal diameter divided by five. When quotient to single digits, need to add "0" to the left of the quotient; 3, * * * said directly with nominal diameter (mm), but in between size series and separated by "/" (2) the diameter of the bearing series (that is, the structure of the same diameter and bearing series of changes in outer diameter and width) with basic code right up the third digital representation, see table 9-2. (3) the width of the bearing series (i.e. structure, inner diameter and diameter are the same series of bearings, the wide (or high) degree of changes in the series) with basic code right up the fourth digit said. Series when the width of 0 series (narrow), or the width of 1 series (normal) series, for most of the bearing is not in the code mark width series code 0 or

1), but (2) for spherical roller bearing, tapered roller bearings (3) and (5) thrust ball bearing, the width of the series (or highly series) code 0 or 1 should be marked. Diameter series code and width size code referred to as series code. See table 9-4. (4) bearing type code using basic code right fifth Numbers (for cylindrical roller bearings and needle roller bearing type code by letters), the said method are shown in table 9-1. 2, front-end code used to represent the division of bearing parts, with the letters. If use L said the release bearing separation ring; K said bearing roller and cage components and so on. For example, LNU207 K81107. 3 and post code is to use letters and Numbers, said the bearing structure, the special requirements of tolerance and material, etc., the content of the post code, here are a few commonly used code. Internal structure code is for the same type bearing different internal structure, followed by the basic code with letters.

Such as: contact Angle is 15 °, 25 ° and 40 ° angular contact ball bearings in C, respectively, the internal structure of the different AC and B said. Bearing tolerance grade levels are divided into 2, 4, 5, 6, 6 x and level 0, a total of 6 levels, in turn, from senior to junior, the code/P2, P4, P5, P6, / / P6x and P0. Tolerance grade, grade 6 x applies only to taper roller bearing, a level 0 for regular grade, not marked in the bearing code. Commonly used bearing radial clearance series is divided into 1 group, 2, 0, 3, 4 and 5 group, a total of six categories, radial clearance, in turn, from small to large. Zero clearance is a common set of clearance, not marked in the bearing code, the rest of the clearance group respectively in bearing code/C1 / C2 and C3, C4 and C5 / said. The actual application of the rolling bearing type is many, the corresponding bearing code is also more complex. About the rolling bearing of the detailed code method can refer to GB/T272-93.

Commonly used miniature bearing model

●682●682ZZ●MR52●MR52ZZ●692●692ZZ●683●683ZZ●MR83●MR83ZZ●693●693ZZ●603●603ZZ●623●623ZZ●MR74●MR74ZZ●MR84●MR84ZZ●684●684ZZ●MR104●MR104ZZ●694●694ZZ●604●604ZZ●624●624ZZ●MR85●MR85ZZ●MR95●MR95ZZ●MR105●MR105ZZ●685●685ZZ●MR115ZZ●695ZZ●605ZZ●625ZZ●MR106●MR106ZZ●MR126●MR126ZZ●686●686ZZ●696ZZ●606ZZ●626ZZ●MR117●MR117ZZ●MR137●MR137ZZ●687●687ZZ●607ZZ●627ZZ●MR128●MR128ZZ●MR148●MR148ZZ●688●688ZZ●698ZZ●608ZZ●MR149●MR149ZZ●689●689ZZ●609ZZ●629ZZ●639ZZ●6000ZZ●16001ZZ●6200ZZ

Bearing quality testing

I. bearing quality testing standards a vibration. Vibration acceleration national standard (commonly known as the Z scale) of the earlier standards, to measure the rotation of the bearing vibration acceleration values ??to determine the bearing quality grade, divided into Z1, Z2, Z3 from low to high three quality grades. Domestic bearing manufacturers are still in use, in order to measure the bearing vibration acceleration values ??the merits, just simply reflect the bearing fatigue life. 2. Vibration velocity standard (commonly known as the V mark) since the original vibration acceleration standard has not been abolished, so that the standard is based on mechanical industry ministerial standards emerge, is the reference to European standards combined with China's actual situation and the need to develop in order to detect bearing vibration velocity divided by Bearing quality level (equivalent to the national standard). Into V, V1, V2, V3, V4 five quality levels. Various ball bearing quality level from low to high as V, V1, V2, V3, V4; roller bearings (cylindrical, conical) quality level from low to high as V, V1, V2, V3 four quality levels. It is based on detecting bearing different frequency bands (low, medium, high) to reflect the speed of the vibration b bearing quality. Bearings can be roughly analyzed whether there geometry problems (such as rims oval), roller / rolling quality problems, quality problems cage, to examine the vibration acceleration than to have a significant bearing quality improvement. Domestic exports to Europe bearing, our military and aerospace industries are in accordance with the standards for bearing quality testing, and testing the quality and resolution of the European imports of counterfeit bearings imported bearings provide a viable means. KOYO bearing inspection, bearings, skf bearing, nsk bearings, fag bearings, IKO needle roller bearings bearing quality testing currently exist two standard parallel situation, while "Z standard" bearing a high quality level to "V standard" detection may not have a good quality of performance, there is no correspondence between the two. This bearing quality testing is to pay special attention. KOYO bearing inspection, bearings, skf bearing, nsk bearings, fag bearings, IKO needle roller bearings two. Detect the vibration measuring instrument bearings used in the operation, ISO2372 standard although they are vibration velocity to determine whether the excessive vibration, but practice in the field with special attention to the bearing acceleration value changes, mostly bearing damage during the initial presentation of fatigue damage, this can generally be expressed as apparent acceleration increases, along with the development of fatigue, the gradual emergence of vibration velocity and displacement elevated, indicating that in bearing fatigue damage. Especially for bearing detection, careful attention to whether the value of unstable vibration swing (recommended analog pointer instrument, you can observe the very obvious), if there is swing, heralded the emergence of unstable vibration signals, acceleration also great, especially the speed while increasing, is likely to exist bearing "playing sets of" fault. KOYO bearing inspection, bearings, skf bearing, nsk bearings, fag bearings, IKO needle roller bearings for new equipment, testing and acceptance, although the vibration is very small, in line with national standards, but in the bearing parts appear small amplitude vibration swing phenomenon, exclude bearing with the problem (playing sets), the most likely bearing geometry problems, such as bearing steel ring oval, rolling through the major axis position, the gap may be due to reduced rolling moment stuck causing the subsequent rolling continue to squeeze, so that sliding friction rolling, rolling each one will appear in this sliding friction, resulting in unstable signal appears.

This problem is detected Shanxi 220KW new motor encountered, the disintegration of detectors to detect bearing, proved entirely correct judgment. KOYO bearing inspection, bearings, skf bearing, nsk bearings, fag bearings, IKO needle roller bearings Special Note: When checking bearings, we must not ignore the bearing acceleration values ??change. Better able to predict the acceleration of early bearing failure. Three. Domestic bearing quality testing of reference 1. Domestic bearing manufacturers product quality analysis reference (through the actual test statistics, under the premise of guaranteed genuine) ① deep groove ball bearings: Wafangdian Bearing Company, Harbin Bearing Company, Luoyang Bearing the company's product quality and performance is still good. ② Cylindrical roller bearings: Zhejiang Tianma Bearing Company's quality is better. ③ Tapered roller bearings: After the actual detection experiments and exploring the national quality inspection center bearing, currently only money flows, Zhejiang Wanxiang Group and Fujian I megabytes group bearing quality acceptable. ④ angular contact ball bearings: Currently Harbin bakelite bracket bearing quality is acceptable. Four. Bearing quality testing analysis reference KOYO bearing inspection, bearings, skf bearing, nsk bearings, fag bearings, IKO needle roller bearings imported bearings quality inspection, the Japanese model of Authenticity bearing quality is still good; but finds a famous bearing quality not ideal, because the country is not the company bearing basic local production. On nominal origin Malaysia and Australia The grade bearing inspection found that its quality is far from ideal, even as regular domestic manufacturers of genuine bearings. KOYO bearing inspection, bearings, skf bearing, nsk bearings, fag bearings, IKO needle roller bearings Tip: Currently all forms of double row rolling bearings and pure axial thrust bearing countries do not have the appropriate testing standards. For angular contact ball bearing axial load to meet the requirements, you can see deep groove ball bearing quality level.

FAG bearing clutch analysis

Clutch bearings during operation revealed failure is common, so do not fuss of. Revealed a failure, determine and dispose of is the key.

 1 FAG bearing temperature is too high at the institutional operation, install the bearing parts allow a certain temperature, when the hand stroked body shell, should not feel hot as normal, in contrast indicates that FAG bearing temperature is too high. Bearing temperature is too high Duanyou include: lubricating oil quality undesirable or deterioration, lubricating oil viscosity is too high; institutions assembly too tight (the gap is not sufficient); clutch bearing assembly tight; bearing ring on the shaft or housing rotation; load is too large; FAG Bearings maintain shelf or Gulu body fragmentation.

 2 FAG bearing bearing noise permitted in the office rang children have tiny operation, if loud children too large or unusual noise or crash, it indicates that the bearing has failed. Gulu bearing noise terminus initiation complex, one of the bearing, the outer ring suitable for exterior wear. Because this kind of wear, damage the clutch bearings and housings, bearing an appropriate relationship with the axis, causing the axis out of the way of the exact position of the shaft at high speed movement initiation abnormal sound. When the bearing fatigue, its exterior metal flake, but also make the bearing radial clearance increased initiation of abnormal sound. Besides this, the bearing lubricant is not sufficient to form a dry friction, and bearing broken and so will the initiation of abnormal sound. FAG Bearings wear Songkuang, the maintenance of aircraft destroyed relaxation also sprouted abnormal noise bearing damage. Gulu Bearing Removal investigation, it can do damage to the bearing condition based on judgment and destruction Duanyou bearing failure. 1 bearing raceway spalling Gulu exterior metal body and the inner and outer ring raceway surface are assumed periodic pulsating load effect, and the initiation of contact stress cycle changes. When the number of stress cycles back up to a certain figures in Gulu body or the outer ring raceway surface on the initiation of fatigue spalling office. If the bearing load is too large, this fatigue worse. Additional, clutch bearing is not properly installed, the shaft buckling, also sprouted raceway spalling. FAG bearing raceway fatigue spalling will reduce the shaft rotation precision, enables organizations to oscillate and noise. 2 Bearing burning burning clutch bearing its raceway, Gulu has tempered the body color. Burning Duanyou ordinary is not enough oil, lubricating oil or undesirable quality deterioration, and bearing assembly too tight and so on. 

3 Van variants in bearing raceway and roller contact surfaces are exposed warp pits sprouted normative interpretation to understand bearing variants. Which end is the clutch bearing static load or a very large impact load utility, the office part of the appearance of the bending stress exceeds the limit, such a thing occurs in low-speed rotation condition of the common bearing. 

4 FAG bearing ring bearing ring crack initiation crack terminus may be appropriate bearing too tight, clutch bearing abnormal or inner relaxation, FAG bearings assimilative pieces variant, installation of bearings such as poor appearance processing. 5. Maintain its terminus frame fragmentation is not enough oil, Gulu body broken, crooked seat and so on. 6 to maintain a metal frame attached to the body Gulu terminus possible Gulu body is stuck in the rack to maintain or oil is not sufficient. 7 seat ring raceway severe abrasion may fall into the foreign body is the seat of the circle, lubricating oil or lubricating oil grades are not enough suitable match.

SKF bearing vibration noise sources [

Question one: SKF bearing vibration of the main factors which? Answer one: SKF bearing vibration has two main sources:

 First, SKF bearings SKF bearings caused by external incentives inherent vibration means SKF bearing inner ring, outer ring, rolling elements and cage the natural vibration. Second is due to contact between moving parts forced vibration caused by the collision, including the rolling sphere is not ideal, inside and outside the channel contact point trajectory is not a perfect circle (roundness, waviness), the raceway is not the ideal smooth surface (roughness) and the rolling elements and cage in motion collision and lubricants in the forced vibration caused by impurities, vibration and sound are closely related. For general SKF bearings, recommended to concentrate the limited human and financial resources improve SKF bearing vibration control. Quality standards should not separate the noise, of course, according to foreign experience, especially for products such as computer hard drives, CD-ROM drive system VCR SKF bearings, vibration assessment is not easy to use, can develop standards to assess noise measurement method.

TIMKEN bearing swivel density

TIMKEN bearing size of the load of the load bearing ring under the action of the radial component, which may be compressed radially, with loose lead, especially in the case of the load transfer back, prone to slipping. Therefore, for heavy-duty applications should normally be lighter than normal loads and loads of occasions with some more tight. In short, the heavier the load, the amount of interference should be greater. ③ Operating temperature bearings in operation since ferrule working temperature is usually higher temperature than the adjacent parts, the bearing inner ring may be due to thermal expansion and loosening of the bearing outer ring may be due to thermal expansion affect the bearing axial clearance, so In selecting the fit, you must pay attention to consider the temperature difference between the ferrule and the thermal conductivity direction. ④

 When TIMKEN bearings rotating precision rotating accuracy and smooth running higher, in order to eliminate the elastic deformation of the bearing parts and vibration, due to the amount of avoided clearance fit. ⑤ shaft and housing structures and materials if the shaft and housing (box) open hole surface irregular, will lead to bearing inner and outer rings is not properly deformed and discontinuity. Folio-style case (box) body, and the bearing outer ring with the interference fit should not be used, they should not make the outer ring in the housing (box) hole rotation. When the bearing mounted in thin-walled, light-alloy casing (box) hole or hollow shaft, bearing in order to ensure adequate bearing surface should be used than installing the thick shell (case) body, cast iron housing (box) or solid body with the selected axis bear more. ⑥ installation and removal of applications in many complex structures, in order to facilitate the installation and removal requires the use of clearance fit. According bearing operation conditions, such as interference fit must be used during installation, you can use the separation of bearings (inner and outer rings can be installed in a cylindrical roller bearings, needle roller bearings, tapered roller bearings and thrust bearings) or tapered bearing bore, can easy handling. ⑦ non-fixed end bearing axial displacement of this displacement is to be installed in non-fixed side bearing a ring in the axial direction can have some swimming gap. Usually a fixed load ferrule (usually outer) with clearance fit installation. If the file using the inner or outer side of the cylindrical roller bearings (2000 and 3200) or needle bearings installed in the non-fixed end, the inner and outer rings are made of interference fit. (2) conical inner bore bearings tapered bore bearings, the installation and removal more convenient, can be installed directly on a tapered journal or outside in the middle of a conical cylinder sleeve (adapter sleeve, withdrawal sleeves), and then mounted on the side of the intermediate sleeve with a cylindrical shaft. Bearing outer ring and housing (box) hole with cylindrical bore bearings with the same rules. With adapter sleeve or withdrawal sleeve non-separable bearings, large bearings for tolerance, but the axis of geometric tolerances must be strictly controlled.

Swedish SKF Bearings code

Swedish SKF bearings SKF in Sweden before and after the code associated company Beijing Jing Lu Chong Trading Company 
(1)SKF bearings  interior design ACD - contact angle of 25 degrees. B - contact angle of 40 degrees. CC - contact angle of 12 degrees. CD - contact angle of 15 degrees. BE - contact angle of 40 degrees in the BE-type bearings, ball increase in glass fiber reinforced polyamide 6.6 cage. Double row angular contact ball bearings A - 90 mm outside diameter less than or equal to the standard design bearing no ball gap, the use of glass fiber reinforced polyamide 6.6 cage. E - ball bearing side of the mouth, can be installed more balls, so it has high radial and axial load carrying capacity. Spherical roller bearings CAC, ECAC, CA, ECA - those designed for large-size bearings, roller symmetrical type. CC, C, EC - these bearings roller symmetrical type, inner wall. E - SKF company is using the latest standard design. E-type bearing outer ring with a tank and three hole, then the post code to be added in W, to show the difference. Cylindrical roller bearings B - bearing using surface treated roller (full complement cylindrical roller bearings). B4 - roller bearing ring surface and the surfaces are treated (full complement cylindrical roller bearings). EC - bearing internal geometry improved, a higher carrying capacity, ribs and roller end contact and has good lubrication conditions, can withstand high axial loads. (
2) exterior design CA, CB, CC - Universal paired single row angular contact ball bearings, can be arbitrary (in series, face to face or back to back) paired installation. Back to back or face to face arrangement, the axial internal clearance before installation and normal ratio: Small (CA), normal (CB), the larger (CC). -2F - spherical ball bearings on both sides of the dust ring with rejection. -2FF - spherical ball bearings on both sides of the dust ring with a combination of rejection. G - General paired single row angular contact ball bearings. Face to face or back to back arrangement, the bearing has some pre-installed load. GA - face to face, back to back arrangement, the bearing pre-load lighter. GB - face to face, back to back arrangement, the bearing preload moderate. GC - face to face, back to back arrangement, bearing a heavier preload. K - tapered bore, taper 1:12. K30 - tapered bore, taper 1:30. -LS - bearing side with contact seals, no inner seal groove. -2LS - bearings on both sides with LS seal. N - bearings with snap groove on the outer ring. NR - bearings with snap groove on the outer ring and a retaining ring. N2 - outer chamfer has two diametrically opposed notches. PP - bearing (bearing roller bearings, cam follower bearings) with contact seals on both sides. RS - bearing (needle bearing) side with a synthetic rubber or polyurethane-contact seals. -RS1 - bearing side with synthetic rubber lined steel contact seals. -2RS1 - bearings on both sides with RS1 seal. -2RS - bearing (needle bearing) on ​​both sides with RS seal. -RZ - bearing side lining plate with low-friction seal of synthetic rubber. -2RZ - bearings on both sides with RZ seal. X - 1. Basic dimensions amended to conform to the ISO standard; 2. Cylindrical rolling surface (bearing roller bearings, cam follower bearings). Z - bearing side with a dust cover (non-friction seal). -2Z - bearings on both sides with a dust cover. -ZN - bearing side with a dust cover on one side and a groove on the outer ring. -2ZN - bearings on both sides with a dust cover, the outer ring groove. -2NR - with-ZN, and with a snap ring. -2ZNR - with-2ZN, and with a snap ring. (3) In order to show the bearing retainer cage to guide the way, the cage can be added after the post code letters A or B. A represents the outer ring guided cage; B represents the cage from the inner guide. No representation cage guided by the rolling elements. F - steel or special cast iron solid cage. J - steel stamping cage. M - light alloy solid cage. MP - Solid brass cage. P - 6.6 Glass filled nylon molding cage. TN - plastic molding cage. Y - copper stamping cage. V - full roller bearings (without cage). VH - by a non-separable roller assembly consisting of full roller bearings (cylindrical roller bearings). (3) Other features 1) Tolerance class / CLN - equivalent to ISO tolerance class 6X, for metric tapered roller bearings (width tolerance has decreased). / CL0 - equivalent ISO0 grade tolerances for inch tapered roller bearings. / CL3 - equivalent ISO3 grade tolerances for inch tapered roller bearings. / CL7A - meet the standard differential bearing configuration tapered roller bearings. / CL7C - meet the standard differential bearing configure special tapered roller bearings. / P4 - dimensions and rotational accuracy conform ISO4 level tolerance (more than P5 precision). / P4A - dimensional accuracy tolerances conform ISO4 level, rotation accuracy equivalent AFBMA standard ABEC9 level. / P5 - Size rotational accuracy conform ISO5 level tolerance (accuracy better than P6). / PA9A - dimensions and rotational accuracy equivalent AFBMA standard ABEC9 level. / PA9B - dimensional accuracy equivalent AFBMA standard ABEC9, rotation accuracy is higher than PA9A high. / SP - dimensional accuracy is about P5, rotation accuracy is about P4. / UP - dimensional accuracy is approximately P4, rotation accuracy better than P4. 2) bearing clearance / C1 - clearance within the standard of a group, clearance less than two groups. / C2 ​​- clearance within the standard of two groups, clearance less than 0 groups. / C0 - clearance within the standard of group 0, code omitted, does not mean that. / C3 - standard clearance provisions of the three groups, clearance greater than 0 groups. / C4 - clearance within the standard of four groups, clearance greater than 3 groups. / C5 - clearance within the standard of five groups, clearance greater than 4 groups. When the clearance code and bearing tolerance class code P4, P5 or P6 when combined clearance code C can be omitted. Example: P6 + C2 = P623) specific technical requirements. / Q - Best internal geometry and surface roughness (for tapered roller bearings). / Q66 - vibration level is less than ordinary standard, vibration peak is less than ordinary standard. / QE5 - in line with the special standard motor, size and rotation accuracy up to P6. Extremely low noise. / QE6 - comply with the standard motor, low noise. 4) bearing configuration. / DB - two can be paired single row deep groove ball bearings, single row angular contact ball bearings or single row tapered roller bearings installed in pairs back to back. DB number after the size indicates the axial clearance or preload installation size. A - Light preload (angular contact ball bearings). B - preload greater than A (angular contact ball bearings). C - preload larger than B (angular contact ball bearings). CA - internal clearance smaller (deep groove or angular contact ball bearings). CB - internal clearance than the CA large (deep groove or angular contact ball bearings). CC - internal clearance than CB large (deep groove ball bearings). CG - "zero" clearance (tapered roller bearings). C ... - Special Axial internal clearance CC behind the numbers indicate the size of the axial clearance. GA - light preload (deep groove ball bearings). GB - pre-load is greater than CA (deep groove ball bearings). G ... - Special pre-load (G behind the numbers indicate the size of the pre-load). / DF - arranged in two face-paired single row deep groove ball bearings, single row angular contact ball bearings or single row tapered roller bearings. DF can be followed with the same letters after DB. / DT - two pairs arranged in series deep groove ball bearings, single row angular contact ball bearings or single row tapered roller bearings. 5) Heat treatment. Bearing inner ring size after stabilization, you can run the following temperatures :/ S0 - up to 150 degrees Celsius. / S1 - up to 200 degrees Celsius. / S2 - up to 250 degrees Celsius. / S3 - up to 300 degrees Celsius. / S4 - up to 350 degrees Celsius. 6) lubricant added. / W - can not replenish oil (no oil groove and oil hole). / W20 - bearing outer ring has three lubrication holes. / W33 - bearing outer ring with lubrication groove and three hole. / W33X - bearing outer ring with lubrication grooves and six hole. 7) lubricant. Used to identify the type of bearing grease filled the post code consists of a group of letters and two digits, letters temperature range, followed by two numbers indicate the actual use of the grease, common letter groups are as follows :/ HT - high temperature Grease (-20 degrees C to +130 degrees C). / LHT - low / high temperature grease (-40 degrees C to +140 degrees C). / LT - low fat (-50 degrees Celsius to +80 degrees Celsius). / MT - medium temperature grease (-30 degrees Celsius to 110 degrees Celsius). MT post code represents a specific non-standard bearing grease. 
The amount of the standard SKF bearings  bearing grease filling quantity (the free space inside the bearing 25% ~ 30%) is not the same, identified by an additional letter: A: less than the standard dosage amount of grease. B: amount of grease than the standard amount. C: grease consumption is greater than B. 8) other features. Letters V and another letter (eg VA) with three number combinations, can not be used to identify other existing post code expressing a variant of the standard design. If :/ VA201 - kiln car bearings. / VA301 - traction motors with cylindrical roller bearings.

Spherical roller thrust bearing preload improvements

Axial spherical roller bearings from a structural point of view, their tight circle of bearings, rollers, cage not separated by a bushing lock to become whole, but live between the ring and the whole is separable. In the lower bearing vertical installation may be made by bearings, shaft and shaft weight of the other pieces, so tight, no separation between the live ring state. However, in vertical and horizontal installation installed at both ends of the upper part of the bearing, which is usually the end cap pressed after pressing the bolts back a certain distance (0.2-1mm), in order to avoid clearance is too small, operating temperature differences cause bearing stuck phenomenon. {TodayHot} but the gap appears, if the gap is too large, it will form a tight circle ring member and the separation between the living state, so a reasonable pretension to prevent rolling spin and revolution skidding, you can keep rolling in the correct location in the raceway. Normal operation of the bearing, it is necessary to exert an axial load, the required minimum axial load is: Famim = Coz/1000Famim------- minimum axial load (KN) Coa 

Basic static load (KN) 2004 years, spherical roller bearings  we Benxi Iron and Steel Company for the hot rolling mill plant 1700 supporting the production of spherical roller thrust bearings 292/500 bearing, the bearing face two sets installed in the mill backup roller, used to bear axial force. It face to face horizontally mounted in the bearing, the bearing work to prevent stuck in a pinch bolt face plate, then loosen the distance more than 0.2mm. To avoid a work roll bending after the thrust bearing radial force, axle hole and live ring taken between the outer diameter> 2mm with the gap in the intermittent force, the more likely stuck, and even other parts of the bearing to withstand the impact of the damaged part. {HotTag} After analysis, we believe that this compression method is unreasonable, but can only think of ways in bearing design, the research, we end face of the bearing ring designed eight uniform spring holes for mounting 8 3 mm in diameter springs, each spring of the spring force of 800 Newton maximum, so that the bearing mounted in the housing and pressing plate, due to the spring force directly acts on the first end face of the bearing housing and the cover, so when the shaft the displacement to the right and left neck when not being floated, it can ensure that the rolling body raceway in the correct position. The roller and the raceway contacts start to finish in good condition.

 Preload can spherical roller bearings  basically achieve the purpose, but ran in the axial force by the spring bore cylindrical Shaw under the action of the spring force of the first contact with the bearing seat and lid, the axial force had buffering, so that the original bearings damage been resolved, greatly extend the life of bearings to meet the user requirements, the user has the praise.

SKF bearings installed correctly affects accuracy, longevity, performance

Bearings are important parts of construction machinery on one, the installation will affect the use of poor results, or even result in construction machinery and equipment failures. If there is iron SKF bearings, burrs, dust and other foreign matter to enter, SKF bearings will generate noise and vibration during operation, even damage the raceways and rolling elements. Therefore, SKF bearings installed, you must ensure that the installation surface and the installation environment clean. Lubrication of the bearing operation and life has a very important influence. Grease from the base oil, thickener and additives. The performance of the grease determined by the base oil. Other low viscosity base oil for low temperature, high speed; high viscosity suitable for high temperature, high load. Between the lubrication performance thickeners, grease thickeners water determines the water resistance. In principle, you can not mix greases of different brands, and even the same kind of grease thickener, also due to the different additives adversely affect each other. SKF bearings coated with anti-rust oil, we must use clean gasoline or kerosene carefully cleaned, and then coated with a clean high-quality or high-temperature grease before installation. Closed SKF bearings do not need cleaning refueling. 

In SKF bearings after installation, if not carefully for alignment, alignment may lead to SKF bearings subjected to additional load, friction and vibration. These may accelerate fatigue and reduce the life of SKF bearings and other machine parts may damage the period of use. In addition, the increased vibration and friction may significantly increase energy consumption and risk of premature failure. During use, SKF bearings should regularly run the basic monitoring external conditions, such as temperature, vibration and noise measurement and so on. These regular inspections will identify potential problems and prevent unexpected machine stop, so that production plans are realized, to improve plant productivity and efficiency. During operation, SKF bearings require a correct re-lubrication, perfect its performance. 

SKF Bearing lubrication methods, divided into grease and oil lubrication. In order to make a good play SKF bearings function, first, to select the appropriate conditions of use, purpose of use lubrication method. Only consider lubrication, oil lubrication dominant. But there can be simplified greased SKF bearings surrounding structure of expertise. SKF Bearing piston pump with the most important parts are bearings SKF bearings reduce the negative pressure is to prevent water from entering the basic requirement. Angular contact bearing load calculation. Locomotive bearing maintenance is very important to the oil. Motor SKF Bearing overheating reasons why.

Bearing torque, load and life

1 starting torque startingtorque make a bearing ring or gasket ring relative to another fixed or washers torque required to start rotating. (2) When a rotational torque runningtorque rotating bearing ring or gasket to prevent movement of another ring or gasket torque required. 3 radialload radial load acting on the bearing axis line direction perpendicular to the load. 4 axialload axial load acting on the bearing axis line parallel to the direction of the load. 5 staticload static load bearing ring or gasket when the relative rotational speed of zero (or thrust bearing to the heart) or when the rolling element in the rolling direction when no motion (linear bearings), the load acting on the bearing. 6 dynamicload dynamic load bearing ring or gasket when the relative rotation (to the heart or thrust bearings) or when the rolling element in the rolling direction of movement (linear bearings), the load acting on the bearing. 7 Theory of Computation load equivalent load equivalentload General terms used in specific situations, bearing under load in this theory as to withstand the actual load. 8 radial (axial) Basic Static Load basicstaticradial (axial) loadrating rolling elements and raceways with a total permanent deformation corresponding radial static load (central axial static load). If at zero load, roller and raceway (roller bearing) is assumed to be normal or bus (line contacts) when the maximum contact stress, the rolling element and raceway contact produces a total permanent deformation of the rolling element 0.0001 times the diameter.

For single row angular contact bearings, radial load rating of the bearing rings relative to each other due to pure radial displacement of the radial component of the load. 9 radial (axial) Basic dynamic load basicdynamicradial (axial) loadrating constant radial load (constant axial load center), the load, the bearing can theoretically withstand a million revolutions of the basic rating life. For single row angular contact bearings, radial load rating of the bearing rings relative to each other due to pure radial displacement of the load weight. 10 Life (refers to a set of bearings) life bearing a ring or a gasket or a rolling fatigue propagation material first appeared before a ring or a gasket relative to another ring or a gasket revolutions. Life can also be used at a given constant speed expressed as the number of operating hours. 11 Reliability (refer to bearing life) reliability operating under the same conditions a group of nearly identical rolling expected to meet or exceed a specified percentage of the life of the bearing. A bearing reliability meet or exceed the requirements for this bearing lifetime probability. 12 rated life ratinglife radial or axial basic dynamic load rating Basic dynamic load rating based life prediction values. 13 basic rating life basicratinglife reliability associated with 90% of the rated life. 14 life factor lifefactor order to obtain the corresponding given nominal life of the basic dynamic load rating Radial or axial basic dynamic load rating for equivalent dynamic load correction factor. 15 Bearings plummerblock radial bearings and seat combination with a component, in line with the bearing axis parallel to the support surface for the mounting screws on the bottom plate. 16 vertical seat plummerblockhousing mounted rolling bearing pedestal. 17 flangedhousing a radial flange flange seat and in line with the bearing axis perpendicular to the bearing surface for its mounting on the screw holes as a seat. 18 tight sets with cylindrical bore adaptersleeve axial opening sleeve, the outer surface and the small end of the conical external thread. Used to have a tapered bore bearing mounting (with lock nut and lock washer) in a cylindrical outer surface of the shaft. 19 Withdrawal sleeves withdrawalsleeve axial opening having a cylindrical bore of the sleeve, the outer surface of the conical external thread and big endian.

A tapered bore for the bearing axis of the cylindrical outer surface of the installation or removal (with a nut). 20. Locknut locknut having a cylindrical outer surface and the axial grooves female screw with lock washer and an annular outer claw wrench to tighten the nut. Axial positioning for a rolling bearing. 21 lock washer lockwasher many thin steel outer claw washer. An outer claw for locking nut, an inner claw into the adapter sleeve or shaft axial slot. 22 eccentriclockingcollar eccentric eccentric bore at one end of the groove relative wheel, mounted on the outer spherical bearing inner ring elongation equal eccentric side. Eccentric relative to the rotating inner ring fastened to the inner ring, and then tighten jacking wire so fastened on the shaft. 23 mounted on the outer concentric spherical bearing sleeve concentriclockingcollar wide inner ring on the wheel, there is the top wire screwed into the hole in the inner ring and the contact with the shaft.

The key technology of bearing manufacturing(1)

Bearing manufacturing key technologies of the: "wheel" electrode of wedm machining multiple points of nc machining cutter dividing type machine tool accessory of a significant breakthrough in technology numerical control lathe machining axial parts 4 source program KV1000 frequency converter in the application of plate leveler machine tool blade material and heat treatment CA precision casting cae SIEMENSSINAUTMD720-3 - dedicated to S7-200 series PLC of GP's fine machine on display batch processing using the multi-body dynamics simulation of composite processing machine based on RecurDyn how to choose the kind of wire cutting machine CNC machine tool servo motor fault maintenance term comments - machining center CNC machine blade grinding problem protruding generated when high speed milling tool path optimization set up two kinds of new high performance used in mould industry cutter tool soft oil pipeline car wire production line PLC control technology review basic function of mitsubishi numerical control transformation of CNC lathe machine tool rod long boring processing example technical key manufacturing lubrication rolling bearing seal test of modern simulation technology in our country the rapid development of technology computer widely used in the practice application direction size lubrication way rotating speed environment condition of bearing load bearing parameters input computer through calculus to understand bearing may share this kind of test method to evaluate whether the bearing design life greatly shorten the test time reduced human test prior to the completion funds bearing manufacturing. Modern simulation technology with the wide application of computers and rapid development. The specific practices of this technology is to apply a certain condition of bearing load direction, size, lubrication, rotation speed and environmental parameters, and bearing the main parameters such as input computer at the same time, through calculus, understand the life of the bearings may reach, so as to evaluate the bearing design is operable.

This test method can greatly shorten the test time, reduce the manpower and research funds, can be done in bearing manufacture, know in advance its application effect, is a kind of quick and easy test method. Foreign advanced SKF bearing industry company, NTN bearing simulation test technology research at advanced level. Development trend both at home and abroad at present, the bearing test methods at home and abroad, there are four main: one, the friction and wear test, test bench test, three, laboratory testing ground simulation test, four operation test, the actual working condition. Overseas for the above several test methods were used, but different application purpose, for example, to develop a new product, must first do friction and wear test. But if the friction wear form without much change, only change product size, loading conditions, then just do platform, simulation or actual operation test. Overseas for some of the key parts of the new products (such as a car wheel hub bearing, etc.), the inspection is very strict, must through practical test, used to be allowed. Swedish SKF bearing, Japan NTN recent research simulation test, simulation technology, only alternative test bench or experiments, so as to shorten the time of product design, speed up the progress of product development, but the actual operation situation and the gap. Now, China's bearing industry has to carry out the friction and wear test, only a luoyang bearing research institute; Has been carried out bearing test bench, the shaft developed by luoyang bearing research institute, Shanghai, hangzhou bearing test center and wafangdian, Harbin and so on more than 20 bearing state-owned enterprises; Can expand the simulation test of luoyang bearing research institute, hangzhou bearing test center and luoyang, shaft, and other enterprises.

Rather than the actual test, only in the aspect of supporting the host enterprises put forward the bearing production enterprises shall, when required, such as wheel bearings of railway passenger cars and car wheel hub bearing, etc. All in all, the domestic in the aspect of simulation and practical operation tests is not wide, should further expand scope, host range, or the actual working condition for simulation test schedule as soon as possible ready for the full hardware and software. In simulation experiment, the main research contents and goals in order to for some typical types of typical products need to test bench or simulation test, find out the function relationship between the life and working condition of bearing, and then using this relationship, through the computer for bearing design and test work, this is usually only for those very important product test. According to our country existing ability over the next decade, the main goal is for railway vehicle bearings, automobile wheel hub bearings and high speed grinder spindle bearing simulation experiment research, and gradually have a certain simulation test conditions.

Bearings Features

One, thrust tapered roller bearing structure, performance characteristics due thrust tapered roller bearings rolling body is tapered roller, rolling in the structure of the bus and the raceway washers are bus lines intersect at the axis of the bearing of a point, and thus can form pure rolling rolling surface, speed limit higher than thrust cylindrical roller bearings. Thrust tapered roller bearings can withstand a one-way axial load. Thrust tapered roller bearing type code 90000. Since thrust tapered roller bearing production is less, the plant has produced models are mostly nonstandard dimensions, while the standard dimensions of the series, varieties produce less, and thus currently no kind of bearing dimensions introduction of national standards.

Second, the thrust angular contact ball bearing structure, performance characteristics thrust angular contact ball bearing contact angle of 60 ° commonly used general thrust angular contact ball bearings are generally two-way thrust angular contact ball bearings, mainly used for precision machine tool spindle, generally with double row Cylindrical roller bearings used in conjunction, can withstand axial load, with high accuracy, good rigidity, low temperature, high speed, easy assembly and disassembly.

Three, double row tapered roller bearing structure, performance characteristics double row tapered roller bearings range, the maximum amount is 35 000 type, with one pair of outer and two inner raceway, there is an interval between the two inner rings, changing the thickness of the spacer adjustable clearance. These bearings radial load at the same time can withstand axial load in the axial bearing clearance range limit axial displacement of shaft and housing.

Fourth, tapered roller bearings structural characteristics of the type code 30000, tapered roller bearings are separable bearings. Under normal circumstances, especially in GB/T307.1-94 "Rolling bearings tolerance" are involved in a range of sizes within the tapered roller bearing outer ring and inner components can be interchanged between one hundred percent use. The angle of the outer ring and the outer raceway diameter size has been standardized with the same size and shape provides. Not allowed to change in design and manufacturing. To cause the tapered roller bearing outer ring and inner components available in the world between interchangeable. Tapered roller bearings are mainly used to bear radial load mainly radial and axial joint load. And angular contact ball bearings, bearing capacity, low speed limits. Tapered roller bearings can withstand axial load in one direction, the shaft or housing to limit axial displacement in one direction.

Five, deep groove ball bearings features in the structure of deep groove ball bearings Each ring has a cross-section of the ball about one-third of the equatorial circumference of the continuous groove type raceway. Deep groove ball bearings are mainly used to bear radial load, but also bear certain axial load. When the bearing radial clearance increases, with the nature of angular contact ball bearings, can withstand both directions alternating axial load. With the same size compared to other types of bearings, such bearings friction, high limiting speed, high precision, user selection is the preferred bearing type. Deep groove ball bearing structure is simple, easy to use, is the largest production volume, most widely used of a class of bearings.

NSK bearings complementary code instructions

NSK bearings bearing code by the basic code, codes of front and rear codes, basic code series (including the type) of said bearing inside diameter size and contact Angle; Front code said specific bearing; Post code is bearing the structure of the shape, size, material, seal and cage, tolerance, clearance, heat treatment, lubrication, and technical requirements are changed, after bearing the basic code to add complementary code.

1. The front code F - flange outer ring of the deep groove ball bearings (applicable to d is less than 10 mm), example: F605. HR - tapered roller bearing, high load cases: HR30207J. MF - specific size of the flange outer deep groove ball bearing is less than 10 mm (d), example: MF52. MR - specific size deep groove ball bearings (applicable to d is less than 10 mm), example: MR31.

2. Post code (1) internal structure - A different bearing internal design and standard. A - angular contact ball bearing, the contact Angle of 30 degrees. A5 - angular contact ball bearing, the contact Angle of 25 degrees. B - angular contact ball bearing, the contact Angle of 40 degrees. C - angular contact ball bearing, the contact Angle of 15 degrees. C - tapered roller bearing, the contact Angle of 20 degrees. D - tapered roller bearing, the contact Angle of 28 degrees. C, CA (with brass entity cage), CD (with punching cage) - high load spherical roller bearings. E - high load of cylindrical roller bearing. H - high load thrust spherical roller bearings. J - the small end of the tapered roller bearing outer ring raceway diameter, Angle, outer ring width in accordance with ISO regulation. (2) the material g - ring, rolling body for carburizing steel. H - ring, rolling body is stainless steel. (3) maintains a M - copper alloy solid cage. W - punching cage. V - without the cage. (4) seal, dust cover Z, ZS - side plate dust cover. ZZ, ZZS - two sides with steel dust cover. DD, DDU - two sides with contact rubber seal. V - one side with non-contact rubber seal. V. v. - two sides with non-contact rubber seal. (5) ring shape K - cone hole, taper 1:12. K30 - cone hole, taper 1:30. E - incision or oil hole on the ring. E4 - grease groove on the outer ring, oil hole. N - outer diameter with locking slot. NR - outer diameter with locking slot, snap ring. (6) and liner DB - back-to-back installed in pairs. DF - face-to-face installed in pairs. DT - series installed in pairs. + K - outer ring gasket. + L - ring gasket inside. + in KL -, outer ring gasket. (7) clearance C1 - centripetal bearing radial clearance, smaller than C2 clearance.

Spherical roller bearings Supplemental code

Spherical roller bearings add code suffix used to identify the spherical roller bearing certain characteristics, including SKF spherical roller bearings, open design, sealed spherical roller bearings, mechanical vibration bearings: C2: radial clearance smaller than normal group C3: radial clearance greater than Normal C4: radial clearance than C3C5: radial clearance than C4C08: rotational accuracy to ISO tolerance class 5C083: C08 C3C084: C08 C42CS: bearings on both sides with a steel skeleton hydrogenated nitrile rubber (NBR) contact seals. Outer ring with lubrication groove and three lubrication holes, covered by a plastic band. 

Spherical roller bearings 2CS2: bearings on both sides with a steel skeleton Viton (FPM) contact with the seal. Cylindrical outer ring with lubrication groove and three lubrication holes, covered by a plastic band. 2CS5: bearings on both sides with a steel skeleton of hydrogenated nitrile rubber (HNBR) contact seal. Other 2CS2 same HA3: hardened inner ring K: tapered bore, taper: 1:12 K30: tapered bore, taper: 1:30 P5: dimensional accuracy and rotational accuracy to ISO tolerance class 5P6: dimensional accuracy and rotational accuracy to ISO tolerance Level 6P62: P6 C2VA405: vibrating machinery bearings, hardened cage VA406: VA405 and an inner hole with a polytetrafluoroethylene (PTFE) coated VE552 (E): average published outer side with three threaded holes to connect the lifting device; E represents bearings with eyebolts VE553 (E): the VE552 same, but both sides are threaded holes VG114: hardened pressed steel cage VQ424: rotational accuracy than C08W: no outer lubrication groove and lubrication hole.

Spherical roller bearings W20: outer ring with three lubrication holes W26: inner ring with six lubrication hole W33: outer ring with lubrication groove and three lubrication holes W64: marked with solid oil bearing W77: W33 identical with, but the lubrication hole even stopper W513: W26 W33235220: hardened inner ring, bore with a spiral groove.

Sliding bearings and rolling bearings Compare

Sliding bearings and rolling bearings Compare

 1) sliding bearing company bearing (lead-based alloys watts) generally three years pouring a times, each lead-based alloys need 4000 yuan, so the average annual maintenance cost of bearing wear 1333 yuan. When I first joined lubricants 120kg, 2 times a year for oil, running an average of every two weeks, add oil 15kg. The oil price of 5 yuan / kg, the annual cost of (120 × 2 +15 × 2 × 10) × 5 = 2700 dollars. 

2) rolling bearings two sets of rolling price of 90,000 yuan, the design life of 10 years, bearing wear planned depreciation expense 09,000 yuan / year. When I first joined grease 60kg, running monthly added 8kg, grease price of 7 yuan / kg, the annual cost of (60 +8 × 10) × 7 = 980 million. 2 Energy Consumption Motor Power Factor cosφ = 0.85, 3 times by recording the voltage and current data, using the formula P = UIcosφ computing power as energy compared in Table 1. An average of 3 times a result, bearing sliding bearing energy than 4.3kW, margin of 1.3%. If the tariff by 0.5 yuan / kWh, the annual electricity difference of 4.3 × 300 × 24 × 0.5 = 15480 dollars. 

3 Conclusion rolling bearings wear depreciation, fuel consumption and power consumption comparison, bearing wear and bearing an annual fuel cost more than 5,947 yuan, but the use of rolling bearings in a ball mill to save electricity than 15,480 yuan.

Long-life INA Bearing selection requirements

From the viewpoint of long-life, INA Bearing selection requirements are: 

(1) selection of high load capacity INA Bearing INA Bearing Type INA Bearing selection should take into account the price, or the use of higher load capacity but more expensive INA bearings, or in respect of the ordinary INA bearings while the other managed to extend its life. Using a high load capacity INA bearings, for example, with a crown of cylindrical roller bearings with symmetrical rollers Spherical roller bearings, reinforced tapered roller bearings and ball bearings, ball groove ball bearings bus corrected, or with 70000CD series INA bearings instead of groove (single row radial) ball bearings, which have a high load capacity or because of INA bearings improve stress distribution, or because of a larger number of rolling elements which may have a higher fatigue life . 

(2) select the appropriate size to make INA Bearing INA Bearing size chosen, must be accurately calculated or actual work of checking INA Bearing load, speed and operating temperature. Load INA Bearing life for the greatest impact, so although the load but also the most difficult to measure as accurately measured. When the load measurements are in trouble, measure the actual motor power consumption, according to projections transmission line power loss and net along the way, until relatively close to the actual calculated INA Bearing load. Calculated or measured load is too large, INA Bearing inevitable fatigue life can be expected with greater amplitude decreases, must try to remedy the situation. If the installation site allows optional one size larger files INA bearings; if the radial size is limited, there is a wide INA bearings in which case it shall elect a wide INA bearings; If you can not take advantage of a wide INA imports bearings, could be replaced by a higher load carrying capacity INA bearings. 

(3) Select the appropriate choice of materials INA Bearing materials must take into account its price, but when you have to use a vacuum smelting or remelting steel, pay attention to the need to make perfect the lubrication conditions in order to multiply improve INA Bearing fatigue life can be expected. Of course, the choice of high-quality steel products such as the cost of manufacturing INA Bearing higher load capacity than the choice of INA bearings is much more expensive, but in the machine inaccessible and difficult to dismantle the INA bearings, or mines, tunnels operating machinery used in INA bearings, maintenance extremely difficult situations, and sometimes must still be considered.