Cancel
Ball Bearing Numbering System
| MATERIAL | BEARING TYPE | BEARING PART NO | RETAINER | SEAL AND SHIELDS | RADIAL CLEARANCE | TOLERANCE CLASS | |
| Ex.1 | 688 | J | ZZ | MC3 | |||
| Ex.2 | F | 608 | TW | 2RS | MC4 | P6 | |
| Ex.3 | MR | 52 | W | ZZ | MC2 | P5 | |
| Ex.4 | S | MF | 128 | W | TTS | MC3 | P6 |
| Ex.5 | S | ER | 1458 | W | ZZS | C0 | A3 |
| Ex.6 | 6025 | RJ | 2RS | C3 | p5 | ||
| Ex.7 | F | 6006 | W | 2RU | C0 | ||
| Ex.6 | 6025 | RJ | 2RS | C3 | p5 | ||
| Ex.7 | F | 6706 | W | 2RY | C0 | ||
| Ex.8 | S | R | 144 | J | ZZS | MC4 | A5P |
| Ex.9 | R | 10 | RJ | ZZ | C2 | ||
| Ex.10 | F | 3-8M | TP |
MATERIAL
HIGH CARBON CHROMIUM STEEL
AISI52100 -NO SYMBOL
STAINLESS STEEL
S
BEARING TYPE
- INCH: R
- INCH WITH FLANGE: FR
- INCH WITH EXTENDED INNER RING: RW
- INCH WITH EXTENDED INNER RING AND FLANGE: FRW
- METRIC STANDARD: NO SYMBOL
- METRIC WITH FLANGE: F
- SPECIAL METRIC: MR
- SPECIAL METRIC WITH FLANGE: MF
BEARING PART NO
The basic number is written.
RETAINER
- STEEL RIBBON TYPE : J
- STEEL CROWN TYPE: W
- NYLON CROWN TYPE: TW
- STEEL RIVET TYPE: RJ
- FULL COMPLEMENT: V
SEALS AND SHIELDS
- TEFLON SEAL WITH SNAP RING: TTS
- STEEL SHIELD WITH SNAP RING: ZZS
- PRESSED STEEL SHIELD: ZZ
- CONTACT RUBBER SEAL: 2RS
- NON-CONTACT RUBBER SEAL: 2RU
RADIAL CLEARANCE
- STANDARD: C2,CN(C0), C3, C4, C5
- MINIATURE: MC1,MC2,MC3,MC4,MC5,MC6
TOLERANCE CLASS
- ABEC1: NO SYMBOL
- ABEC3: 3
- ABEC5P: 5P
- ABEC7P: 7P
- ISO CLASS0: NO SYMBOL
- ISO CLASS6: P6
- ISO CLASS5: P5
- ISO CLASS4: P4