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Seiko Instruments Inc.

SEIKO

PRODUCTS

Product Code System

SEIKO
  Material of OR/IR (SUJ2: C, Stainless: S)
    Unit (Metric: No code, Inch: R)
      Part Numbering
        Special feature (Normal design: No code, thin type: X1, etc.)
          Bearing type (Deep Groove: No code, Angular: A1, etc.)
            Shield (Open: No code, Double Shield: ZZ)
              Retainer (Plastic: N, Metal: M)
                Ball Material (SUJ2: CH, Stainless: CS, etc.)
                  Radial clearance (0-5µm: M1, 3-8µm: M2, etc.)
                    Noise Grade (Low noise: LN, Standard level: SD, etc.)
                      Precision Grade (JIS0/ABEC1: B1, JIS5: P5, etc.)
                        Grease Fill Quantity (5-10%: A1, 10-15%: A2, etc.)
                          Lubricant Type (SIT-1301: G1, SIT1303: G2, etc.)
S □□□□ □□ □□ □□ □□ □□ □□ □□ □□ □□□
S C   8030     ZZ N CH M2 LN P5 A5 G01  

Material of Ring and Ball

  Material Code
Inner ring and Outer ring Chrome steel C
Stainless steel S
Ball Chrome steel CH
Stainless steel CS
Ceramic CM

Grease

  Normal High Temperature Super High Temperature
Code 1301 1302 1303 3201 32302 33501 93502 5501 5502
Thickener Lithium soap Urea Urea Urea/PTFE PTFE
Base Oil Ester PAO Ester/
PAO
Ester/
Ether
Ester/
Fluorine
Fluorine
Main applications Small motors (cooling fan motor, etc.) - Small motor
- Server cooling fan motor
- Automotive small
motor
Automotive cooling fan motor and other automotive parts

Miniature Ball Bearing

Bearing Number JIS Bore Diameter: d(mm) Outside Diameter: D(mm) Width: B (mm) DW(mm) x Z 
3010 681 1.0 3.0 1.0 0.5 x 7
4015 68/1.5 1.5 4.0 2.0 0.6 x 7
5020 682 2.0 5.0 2.5 0.8 x 7
8030 693 3.0 8.0 4.0 1.588 x 6
1350 695 5.0 13.0 4.0 2.0 x 8
1560 696 6.0 15.0 5.0 2.8 x 7
R418 R144 3.175 6.350 2.380 1.0 x 7
RW418   3.175 6.350 2.779 1.0 x 7