Top

Seiko Instruments Inc.

SEIKO

PRODUCTS
Miniature Ball Bearing

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

Retainer

  • Plastic Snap cage

    Plastic Snap Retainer

    Material: Nylon
    Code: N

  • Pressed Snap Steel cage

    Pressed Snap Steel Retainer

    Material: SUS420J2
    Code: M

  • Pressed Steel Ribbon cage

    Pressed Steel Ribbon Retainer

    Material: SUS304
    Code: R

  • Shield

  • PRESSED STEEL SHIELD

    Pressed Steel Shield

    Material: SUS304
    Code: Z(One side) ZZ(Both sides)

  • STEEL SHIELD WITH SNAP RING

    Steel Shield with Snap Ring

    Material: SUS304
    Code: Z(One side) ZZ(Both sides)

  • NON-CONTACT RUBBER SEAL

    Non-contact Rubber Seal

    Material: SPCC+ Oil resistant rubber
    Code: LB(One side) LLB(Both sides)

  • CONTACT RUBBER SEAL

    Contact Rubber Seal

    Material: SPCC+ Oil resistant rubber
    Code: ⅬU(One side) LLU(Both sides)

  • Grease

      Normal High Temperature Super High Temperature
    Code 1301 1302 1303 3201 32302 33501 93602 5601 5602
    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

    Lineup

      Bearing Number JIS Bore Diameter: d(mm) Outside Diameter: D(mm) Width: B (mm) DW(mm) x Z 
    mm 3010 681 1 3 1 0.5 x 7
    4015 68/1.5 1.5 4 2 0.6 x 7
    4020 672 2 4 1.2 0.6 x 6
    5020 682 2 5 2.5 0.8 x 7
    8030 693 3 8 4 1.588 x 6
    7040 674 4 7 2.5 0.7938 x 11
    8050 675 5 8 2.5 0.8 x 13
    1350 695 5 13 4 2.0 x 8
    1560 696 6 15 5 2.8 x 7
    inch R418 R144 3.175 6.35 2.38 1.0 x 7
    RW418 - 3.175 6.35 2.779 1.0 x 7
    RW418A - 3.175 6.35 2.779 1.0 x 7
    R2 - 3.175 9.525 3.967 1.588 x 7
    R614 - 6.35 9.525 3.175 1.0 x 13