Bearing NK47/20 (AST)

Needle Roller Bearings, Precision - Metric Series NK47/20

Bearing number : NK47/20

Size (mm) : 47x57x20

Brand : AST

Bore Diameter (mm) : 47

Outer Diameter (mm) : 57

Width (mm) : 20

Bearing dimensions and specification in AST catalogue:

(dimensions in mm)

Bearing Type - Single Row

Outer Dia (D) - 57.0000

Width (B) - 20.0000

Dynamic Load Rating (Cr) - 28,500

Static Load Rating (Cor) - 56,000

Max Speed (Oil) (X1000 RPM) - 9,500

Shaft (Fw) - 47.000

Weight (g) - 94.50

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.

Designation

Bore Dia, mm

Outer Dia, mm: