NSK Bearing Distributor

Deep Groove Ball Bearings with Flanged Outer Ring (for d less than 10mm), e.g., F605.

HR—High Load Conical Roller Bearings, e.g., HR30207J.

NSK Bearing Back Code Meanings

Bearings with internal design and standards differing from the norm.

A——Angular Contact Ball Bearing, with a contact angle of 30 degrees.

A5 - Angular Contact Ball Bearing, Contact Angle of 25 Degrees

Z, ZS - A dust cover with a steel plate.

ZZ, ZZS - Double-sided steel plate dust cover.

D, DU – a contacting rubber sealing ring.

C1 - Radial clearance of the radial bearing is smaller than that of C2.

C2 - Radial clearance for the radial bearing is smaller than the standard clearance.

CN (Omitted) — Radial Standard Clearance for Tapered Roller Bearings.

C3 - Radial Clearance for Concentric Bearings, larger than standard clearance.

C4 - Radial clearance for the conical roller bearing, larger than C3 clearance.

Deep groove ball bearing

ZZ: Iron dust cover (same as 2Z)

VV: Non-contact Rubber Seals (Same as 2RZ)

DDU: Contact Rubber Sealing Ring (Same as 2RS)

C3/C4: Clearance

M: Copper Retainer

T1X: Roller Guide Retainer for Nylon Resin

P5: Accuracy

2. Spherical Roller Bearings

K: Conical holes (taper 1:12)

K30: Conical Holes (Taper 1:30)

3. Tapered Roller Bearings

EA/C/CD: Steel Retainer Bracket

CA/CAM: Copper Retainer

E4: Oiled groove on the outer circumference (outer diameter side) with oil holes

S11: Operating at temperatures below 200 degrees

K/K30: Featuring conical holes (taper of 1:12/1:30)

4. Conical Roller Bearings

C: Medium cone angle

D: Large cone angle

5. Cylindrical Roller Bearings

ET: Nylon Retainer

Copper Retainer

W: Steel Retainer Bracket

C3:隙游

Enhanced

TP: Outer Ring Guiding PPS Resin Retainer, Maximum Temperature 240 Degrees

TB: Roller Guided PPS Resin Retainer

MR: Roller Guide Copper Alloy Retainer, Maximum Temperature 300 Degrees

KR: Conical internal bore with a taper of 1/12

E44: Outer ring with standard oil groove, oil hole

CC1: Standard Clearance for Internal Cylindrical Holes

CC0: Standard Clearance for Conical Internal Hole

CCG: Special Radial Clearance

P4/P5: Precision

6. Angular Contact Ball Bearings

A/A5/C: 30/25/15-degree angle

TYN: Polyamide Resin Retainer

DB/DF/DT: Back-to-back/face-to-face/parallel

DBD/DFD/DTD: 3-Column Combination

DBB/DFF/DTT: 4-column combination

EL/L/M/H: Pre-tension Micro/Light/Medium/Heavy

P4/P5: Precision

7. Ball screw support bearings

TAC: Contact Angle 60°

DB/DF/DT: Back-to-back/face-to-face/parallel

DBD/DFD/DTD: 3-column combination

DBB/DFF/DTT: 4-column combination

C10/C9: Standard Pre-tension/Light Pre-tension

PN7A/PN7B: Standard Accuracy/Special Management Accuracy equivalent to P4

8. Thrust Angular Contact Ball Bearings

TYN: Polyamide Resin Retainer

DB: Back-to-Back Combination

EL/L: Micro/Light Pre-tension

P4A: Special outer diameter tolerance, others are P4 grade.