Bearing Numbering System

Data downloadable in PDF format:
Bearing Numbering System - Chart

- MATERIAL BEARING
TYPE
BEARING
PART NO
MATERIAL RETAINER SEAL AND
SHIELDS
RADIAL
CLEARANCE
TOLERANCE
CLASS
LUBRICATION
Ex.1 - - 688 H J ZZ MC3 - SRL
Ex.2 - F 608 - TW 2RS MC4 P6 SRL
Ex.3 - MR 52 - W ZZ MC2 P5 AF2
Ex.4 S MF 128 - W TTS MC3 P6 SRL
Ex.5 S ER 1458 - W ZZS C0 A3 SRL
Ex.6 - - 6205 H RJ 2RS C3 - AV2
Ex.7 - F 6706   W 2RU C0 - SRL
Ex.8 S R 144 - J ZZS MC4 A5P AF2
Ex.9 - R 10 - RJ ZZ C2 - AF2
Ex.10 - F 3-8M - TP - - - AF2

 

Material

HIGH CARBON CHROMIUM STEEL
SUJ2 -NO SYMBOL

STAINLESS STEEL
STANDARD METRIC---H
INCH AND MR SERIES---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

LUBRICATION

        CODE
* MULTEMP SRL: (GREASE) : SRL
* ALVANIA NO.2: (GREASE) : AV2
* BEACON 325: (GREASE) : B32
* AERO SHELL FLUID 12: (OIL) : AF2