638ZZ1
SIAIF 638ZZ1
Type

Small ball bearings and miniature ball bearings

Model：638ZZ1
Thickness(mm)：9
Inner diameter d：8
Outer diameter D：28
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Detailed information

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Bearing code
  • Open638
  • Dust cover type638ZZ1
  • Seal式VV638VV
  • Seal式DD638DD
Dimensions
  • d8
  • D28
  • B9
  • B19
  • r (1) (Minimum)0.3
  • r1 (1) (Minimum)0.3
Load rating (N)
  • Cr4550
  • Cor1970
Load rating {kgf}
  • Cr465
  • Cor201
Limit speed(rpm)
  • Grease lubrication Z·ZZ V·V V28000
  • D·D22000
  • Oil lubrication Z34000
Installation size (mm)
  • d a (Minimum)10.0
  • d b (Maximum)12.8
  • Da (Maximum)26.0
  • D b (Minimum)22.8
  • r a (Maximum)0.3
  • r b (Maximum)0.3
weight(g) (Refer to)
  • Open28.3
  • Dust cover type28.6

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