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638ZZ Miniature Bearing
Dimensions: Bore (Inner) Diameter: 8 mm； Outer Diameter: 28 mm； Width (Thickness): 9 mm;

638ZZ
Slewing Bearings of similar size
same inner diameter
same outer diameter
same width
Product Attributes
Bearing Type Ball
For Load Direction Radial
Construction Single Row
Seal Type Shielded
Part Number 638zz
For Shaft Diameter 8mm
Bore Dia (d) 8 mm
Bore Dia Tolerance -0.008mm to 0
For Housing ID 28mm
Outer Dia (D) 28mm
Outer Dia Tolerance -0.008mm to 0
Width (B) 9mm
Width Tolerance -0.12mm to 0
Ring Material 52100 Chrome steel
Ball Material 52100 Chrome steel
Cage Material 300 Series Stainless Steel
Shield Material 300 Series Stainless Steel
Dynamic Load Rating (Cr) (Newtons) 3879
Static Load Rating (Cor) (Newtons) 1586
Max Speed (Grease) (X1000 RPM) 28
Max Speed (Oil) (X1000 RPM)  34
Lubrication Required
Shaft Mount Type Press Fit
Temperature Range -30° to 110 °C
ABEC Rating ABEC-1
Radial Clearance Trade No. C0
Radial Clearance 0.002mm to 0.013mm
RoHS Compliant
Ball Qty 7
Ball Dia 4.7620mm
Weight (grams) 30.3
638ZZ
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