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NSK Bearings Front Code Meaning
F - deep groove ball bearings with flanged outer ring (for d <10 mm), for example: F605.
HR - high load tapered roller bearings, for example: HR30207J.
NSK Bearings Rear Code Meaning
A - interior design and standard bearings.
A - angular contact ball bearings, the contact angle of 30 degrees.
A5 - angular contact ball bearings, the contact angle of 25 degrees
Z, ZS - side with steel dust cover.
ZZ, ZZS - both sides with steel dust cover.
D, of DU - side with a contact rubber seals.
C1 - Radial Bearing radial clearance smaller than the C2 clearance.
C2 - Radial Bearing radial clearance, clearance than the standard.
CN (omitted) - Radial Bearing radial standard clearance.
C3 - Radial Bearing radial clearance, clearance than the standard.
C4 - Radial Bearing radial clearance than C3 clearance.
A deep groove ball bearings
ZZ: iron dust cover (with 2Z)
VV: Non-contact rubber seals (with 2RZ)
DDU: contact rubber seals (with 2RS)
C3/C4: clearance
M: copper cage
T1X: rolling element guide polyamide resin cage
P5: Accuracy
(2) aligning ball bearings
K: with a tapered bore (taper 1:12)
K30: with a tapered bore (taper 1:30)
(3) Spherical Roller Bearings
EA / C / CD: Steel Cage
The CA / CAM: copper cage
E4: with a tank on the outer ring (outer diameter side) with hole
S11: use temperature of 200 degrees below
K/K30: with a tapered bore (taper 1:12 / 1:30)
4 Tapered Roller Bearings
C: in the taper
D: large taper
(5) Cylindrical Roller Bearings
ET: Nylon Cage
M: copper cage
W: Steel Cage
C3: clearance
E: Enhanced
TP: PPS resin outer ring guided cage, and extreme temperatures of 240 degrees
TB: roller guide the PPS resin cage
MR: rolling element guidance copper alloy cage, and extreme temperatures of 300 degrees
KR: taper 1/12 tapered bore
The E44: the outer ring with the standard tank, hole
CC1: Cylindrical bore the standard clearance
CC0: cone hole using the standard clearance
CCG: Special radial clearance
P4/P5: Accuracy
(6) angular contact ball bearings
A/A5/C: 30/25/15 degree angle
TYN: polyamide resin cage
SU / DU: universal combination of single row / 2
DB / DF / DT: combination of back-to-back / face to face / side by side
DBD / DFD / DTD: 3 column combination
DBB / DFF / DTT: 4 combination of columns
EL / L / M / H: pretension micro / light / medium / heavy
P4/P5: Accuracy
7 ball screw support bearings
TAC: the contact angle of 60 degrees
SU / DU: universal combination of single row / 2
DB / DF / DT: combination of back-to-back / face to face / side by side
DBD / DFD / DTD: 3 column combination
DBB / DFF / DTT: 4 combination of columns
C10/C9: standard preload / light preload
PN7A/PN7B: standard precision / accuracy (SU combination only) equivalent to P4
8 thrust angular contact ball bearings
TYN: polyamide resin cage
DB: back-to-back combination
EL / L: Micro / light preload
P4A: outside diameter size of special, the other for the P4 level
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 24130CK30E4 NSK | 150 | 250 | 100 |
| 23130CKE4 NSK | 150 | 250 | 80 |