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.