Products

Product/technological information

1. Bearing Numbering System and Auxiliary Symbols

  Material Bearing Type Bearing Basic Part No. Material Cages Seals & Shields Balls(Note 1) Radial Clearance Tolerance Class Lubricant
Ex.1     688 H J ZZ   MC3 P0 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 P0 AV2
Ex.7   F 6706   W 2RU   C0 P0 SRL
Ex.8 S R 144   J ZZS   MC4 A5P AF2
Ex.9   R 10   RJ ZZ CB C2 A1 AF2
Ex.10   F 3-8M   TP       P0 AF2

Note 1: For hybrid type bearings (steel rings and ceramic balls), please contact our company for details.

Material

  • High Carbon Chromium Bearing Steel
    SUJ2: No Symbol
  • Stainless Steel
    KS440 (QD51, ACD34): (Outer / Inner rings)
    SUS440C: (Balls)

Standard Metric Series: H
MR, MF, ET and Inch Series: S

  • Ceramic
    Si3N4: CB (Balls)

Bearing Types

Inch-series Single-Row Deep Groove Ball Bearing: R
Inch-series Single-Row Deep Groove Ball Bearing with Flange: FR
Inch-series Single-Row Deep Groove Ball Bearing with Extended Inner Ring: RW
Inch-series Single-Row Deep Groove Ball Bearing with Extended Inner Ring and Flange: FRW
Metric-series Single-Row Deep Groove Ball Bearing: No symbol
Metric-series Single-Row Deep Groove Ball Bearing with Flange: F
Special Metric-series Single-Row Deep Groove Ball Bearing: MR
Special Metric-series Single-Row Deep Groove Ball Bearing with Flange: MF
Special Metric-series Extra Thin Single-Row Deep Groove Ball Bearing: ET
Special Inch-series Extra Thin Single-Row Deep Groove Ball Bearing: ER
Thrust Ball Bearing with Raceway: FM
Thrust Ball Bearing without Raceway: F

Bearing Basic Part No.

Indicates the bearing type and dimension series symbol, and the bore diameter number.

Cages

The symbol may not be displayed

Two-Piece Steel Ribbon Type: J
One-Piece Steel Snap Type: W
One-Piece Nylon Snap Type: TW
Two-Piece Steel Rivet Type: RJ
Full Complement Type (without Cage): V
Thrust FM Type: TP
Thrust F Type: TD

Seals & Shields

Teflon Seals with Snap Rings on Both Sides: TTS
Steel Shields with Snap Rings on Both Sides: ZZS
Pressed-steel Shields on Both Sides: ZZ
Contact Rubber Seals on Both Sides: 2RS
Non-Contact Rubber Seals on Both Sides: 2RU

Radial Clearance

Tolerance Class

JIS Class 0: P0 (The symbol may not be displayed)
JIS Class 6: P6
JIS Class 5: P5
JIS Class 4: P4
ANSI/ABMA ABEC1 A1 (The symbol may not be displayed)
ANSI/ABMA ABEC3 A3
ANSI/ABMA ABEC5 A5
ANSI/ABMA ABEC7 A7
ANSI/ABMA High-precision instrument ball bearing Class 5P: A5P
ANSI/ABMA High-precision instrument ball bearing Class 7P: A7P

Lubricants

Main grease brands

Multemp SRL (Our standard grease): SRL
Alvania Grease S2: AV2
Barrierta L55/2 H1: (For high temperatures): L55
Molykote 33M (For low load / low temperatures): M3M
Krytox 240AC (For high temperatures): K24
ISOFLEX SUPER LDS18: SL8
Beacon 325J: B32

Main oil brands

AeroShell Fluid 12 (Our standard oil): AF2
Windsor Lube L-245X: WL2