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Bearing RNA4912 (AST)
Needle Roller Bearings, Precision - Metric Series RNA4912
Bearing number : RNA4912
Size (mm) : 68x85x25
Brand : AST
Bore Diameter (mm) : 68
Outer Diameter (mm) : 85
Width (mm) : 25
Bearing dimensions and specification in AST catalogue:
(dimensions in mm)
Bearing Type - Single Row, Heavy Duty
Outer Dia (D) - 85.0000
Width (B) - 25.0000
Dynamic Load Rating (Cr) - 60,000
Static Load Rating (Cor) - 108,000
Max Speed (Oil) (X1000 RPM) - 7,000
Shaft (Fw) - 68.000
Weight (g) - 275.00
Material - 52100 Chrome steel, or equivalent
The bearing must be used with a hardened inner ring, or a hardened shaft.
Some sizes are available with either a single seal or two seals.
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