8*28*9mm 638 bearing produce with Chrome steel Gcr15 with clearance 2-13um can used for motorcyle clutch .
8*28*9mm 638 bearing produce with Chrome steel Gcr15 with clearance 2-13um can used for motorcyle clutch .
638 2RS 638ZZ Micro Ball Bearing Description :
Dimension：
Inside Diameter: 8mm
Outside Diameter: 28mm
Width Dimension: 9mm
Specification:
Bearing Material: Steel
Seal Material: Rubber sealed
Limiting speed rpm: 31,000
Basic load rating (N)-Static: 1,590
Basic load rating (N)-Dynamic: 4,000
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