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Details

Description of NSK Bearing Code

Description of NSK Bearing Post Code

Xu (1) Internal Structure

A - Bearings with different internal design and standard.

A - Angular contact ball bearing, contact angle is 30 degrees. NSK

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

B - Angular contact ball bearing, contact angle is 40 degrees.

C - angular contact ball bearing, contact angle is 15 degrees.

C - tapered roller bearing, contact angle is 20 degrees.

D - tapered roller bearing, contact angle is 28 degrees.

C, CA (with brass solid cage), CD (with stamping cage) - high load self-aligning roller bearing.

E - Cylindrical roller bearing with high load.

H - High load thrust self-aligning roller bearing.

J - Small end diameter, angle and outer ring width of outer ring raceway of tapered roller bearings are in accordance with ISO regulations.

Xanthium (2) Material

G - Ring, rolling body is carburized steel.

H - Ring, rolling element is stainless steel.

Pickle (3) cage

M - copper alloy solid cage.

T - synthetic resin cage.

W - Stamping cage.

V - No cage.

Seal ring, dust cover

Z, ZS - one side with steel dust cover.

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

D, DU - one side with contact rubber sealing ring.

DD, DDU - Rubber sealing ring with contact on both sides.

V - One side with non-contact rubber sealing ring.

VV - Non-contact rubber sealing ring on both sides.

Hu (5) Ring Shape

K - Conical hole, taper 1:12.

K30 - Conical hole, taper 1:30.

E - There are incisions or oil holes in the ring.

E4 - Outer ring with oil tank, oil hole.

N - Outer diameter of outer ring with stop groove.

NR - Outer diameter of outer ring with stop groove, stop ring.

Pickling (6) Matching and Padding

DB - Back-to-Back Pair Installation.

DF - Face to face installation in pairs.

DT - Pair installation in series.

+ K - Outer ring with gasket.

+ L - inner ring with liner.

+ KL - inner and outer rings with gaskets.

Xu(7) Clearance

C1 - radial clearance of centripetal bearing, smaller than C2 clearance.

C2 - radial clearance of centripetal bearing, smaller than standard clearance.

CN (omitted) - Radial standard clearance of centripetal bearing.

C3 - Radial clearance of centripetal bearing, larger than standard clearance.

C4 - radial clearance of centripetal bearing, larger than C3 clearance.

C5 - radial clearance of centripetal bearing, larger than C4 clearance.

CC1 - Cylindrical roller bearing (not interchangeable) radial clearance, smaller than CC2 clearance.

CC2 - Cylindrical roller bearing (not interchangeable) radial clearance, smaller than the standard clearance.

CC - Radial standard clearance of cylindrical roller bearings (not interchangeable).

CC3 - Cylindrical roller bearing (not interchangeable) radial clearance, larger than the standard clearance.

CC4 - Cylindrical roller bearing (not interchangeable) radial clearance, larger than CC3 clearance.

CC5 - Cylindrical roller bearing (not interchangeable) radial clearance, larger than CC4 clearance.

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

MC2 - Small, micro ball bearing radial clearance, smaller than MC3 clearance.

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

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

MC5 - Small, micro ball bearing radial clearance, larger than MC4 clearance.

MC6 - Small, micro ball bearing radial clearance, larger than MC5 clearance.

CM - The radial clearance of deep groove ball bearings and cylindrical roller bearings for motor.

CT - Radial clearance of cylindrical roller bearings for motor.

Xu (8) Tolerance Grade

P 0 (omitted) - Tolerance grade is 0 according to JIS standard.

P6 - The tolerance grade is in accordance with the JIS standard.

P6X - Grade 6X of tolerance according to JIS standard.

P5 - The tolerance grade is in accordance with the JIS standard.

P4 - Grade 4 of tolerance grade in accordance with JIS standard.

P2 - Grade 2 of tolerance according to JIS standard.

Special Specification of Xu (9)

X26 - Use temperature limit below 150 degrees Celsius.

X28 - Use temperature limit below 200 degrees Celsius.

X29 - Use temperature limit below 250 degrees Celsius.

S11 - Self-aligning roller bearing, use temperature limit below 200 degrees Celsius.