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.