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Bearing 638H (AST)
Ball Bearings Miniature - Instrument Series, Stainless Steel - Metric Series 638H
Bearing number : 638H
Size (mm) : 8x28x9
Brand : AST
Bore Diameter (mm) : 8
Outer Diameter (mm) : 28
Width (mm) : 9
Bearing dimensions and specification in AST catalogue:
(dimensions in mm)
Bearing Type - Open
Bore Dia (d) - 8.0000
Outer Dia (D) - 28.0000
Width (B) - 9.0000
Radius (min) (rs) - 0.300
Dynamic Load Rating (Cr) - 3,879
Static Load Rating (Cor) - 1,586
Max Speed (Grease) (X1000 RPM) - 28
Max Speed (Oil) (X1000 RPM) - 34
Max. Shaft Shoulder Dia. Inner (Li) - 14.5
Min. Housing Shoulder Dia., Outer (Lo) - 21.3
Ball Qty - 7
Ball Dia (Dw) - 4.7620
Weight (g) - 28.10
Precision - A1
Standard Clearance - K25
Material - Martensitic Stainless Steel
Also available in 52100 Chrome Steel
ABEC Grades 1, 3, 5, 7, and 9 are available. Also, the equivalent ISO classes.
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Outer Dia, mm:
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