NSK Bearing Code Description

Post code

✪(1) Internal structure

A - Bearings with different internal designs and standards.

A——Angle contact ball bearing with a contact angle of 30 degrees. NSK

A5 - angular contact ball bearing, contact angle is 25 degrees.

B——Angle contact ball bearing with a contact angle of 40 degrees.

C——Angle contact ball bearing with a contact angle of 15 degrees.

C——Tapered roller bearing with a contact angle of 20 degrees.

D - Tapered roller bearing with a contact angle of 28 degrees.

C, CA (with brass solid cage), CD (with stamped cage) - high load spherical roller bearings.

E - High load cylindrical roller bearing.

H——High load thrust spherical roller bearing.

J——The small end diameter, angle and outer ring width of the outer ring raceway of tapered roller bearing are consistent with ISO regulations.

✪(2) material

g——The ferrule, the rolling body is carburized steel.

H - ferrule, the rolling element materal is stainless steel.

✪(3) cage

M - copper alloy solid cage.

T - synthetic resin cage.

W - stamping cage.

V - no cage.

✪(4) sealing ring, dust cover

Z, ZS - with a steel dust cover on one side.

ZZ, ZZS - with steel plate dust cover on both sides.

D, DU - one side with a contact rubber seal.

DD, DDU - contact rubber seals on both sides.

V - One side with a non-contact rubber seal.

VV - non-contact rubber seal on both sides.

✪ (5) ferrule shape

K - tapered hole, taper 1:12.

K30 - tapered hole, taper 1:30.

E - There are cuts or oil holes in the ferrule.

E4 - oil groove and oil hole on the outer ring.

N——The outer diameter of the outer ring has a stop groove.

NR——Outer ring outer diameter with stop groove, stop ring.

✪(6) fit and pad

DB - back to back in pairs.

DF - face to face paired installation.

DT - installed in series.

+K - the outer ring is padded.

+L - the inner ring is padded.

+KL - inner and outer ring with padding.

✪(7) clearance

C1—The radial clearance of the radial bearing is smaller than the C2 clearance.

C2—The radial clearance of the radial bearing is smaller than the standard clearance.

CN (omitted) - radial standard clearance for radial bearings.

C3—The radial clearance of the radial bearing is larger than the standard clearance.

C4—The radial clearance of the radial bearing is larger than the C3 clearance.

C5—The radial clearance of the radial bearing is larger than the C4 clearance.

CC1 - Cylindrical roller bearing (non-interchangeable) radial clearance, smaller than CC2 clearance.

CC2 - Cylindrical roller bearing (non-interchangeable) radial clearance, smaller than standard clearance.

CC - cylindrical roller bearing (non-interchangeable) radial standard clearance.

CC3 - Cylindrical roller bearing (non-interchangeable) radial clearance, larger than standard clearance.

CC4 - Cylindrical roller bearing (non-interchangeable) radial clearance, larger than CC3 clearance.

CC5 - Cylindrical roller bearing (non-interchangeable) radial clearance, larger than CC4 clearance.

MC1 - Small, miniature ball bearing radial clearance, smaller than MC2 clearance.

MC2 - small, miniature ball bearing radial clearance, smaller than MC3 clearance.

MC3 - Standard clearance for radial clearance of small, miniature ball bearings.

MC4 - Small, miniature ball bearing radial clearance, larger than MC3 clearance.

MC5 - small, miniature ball bearing radial clearance, larger than MC4 clearance.

MC6 - small, miniature ball bearing radial clearance, larger than MC5 clearance.

CM - deep groove ball bearings for motors, radial clearance for cylindrical roller bearings.

CT - Radial clearance of cylindrical roller bearings for motors.

✪(8)Tolerance level

P0 (omitted) - The tolerance class meets the 0 level specified by the JIS standard.

P6 - The tolerance class meets the 6th grade specified in the JIS standard.

P6X - The tolerance class is in accordance with the 6X class specified by the JIS standard.

P5 - The tolerance class meets the 5th grade specified in the JIS standard.

P4 - The tolerance class meets the 4th grade specified in the JIS standard.

P2 - The tolerance class meets the 2 levels specified in the JIS standard.

✪(9)Special specifications

X26 - The temperature limit is below 150 degrees Celsius.

X28 - The temperature limit is below 200 degrees Celsius.

X29 - The temperature limit is below 250 degrees Celsius.

S11 - Spherical roller bearings, the temperature limit is below 200 degrees Celsius.