Bearing Numbering System

Data downloadable in PDF format:

Bearing Numbering System – Chart

 MATERIALBEARING
TYPE
BEARING
PART NO
MATERIALRETAINERSEAL AND
SHIELDS
RADIAL
CLEARANCE
TOLERANCE
CLASS
LUBRICATION
Ex.1  688HJZZMC3 SRL
Ex.2 F608 TW2RSMC4P6SRL
Ex.3 MR52 WZZMC2P5AF2
Ex.4SMF128 WTTSMC3P6SRL
Ex.5SER1458 WZZSC0A3SRL
Ex.6  6205HRJ2RSC3 AV2
Ex.7 F6706 W2RUC0 SRL
Ex.8SR144 JZZSMC4A5PAF2
Ex.9 R10 RJZZC2 AF2
Ex.10 F3-8M 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