Bearing NK21/20 (AST)

Needle Roller Bearings, Precision - Metric Series NK21/20

Bearing number : NK21/20

Size (mm) : 21x29x20

Brand : AST

Bore Diameter (mm) : 21

Outer Diameter (mm) : 29

Width (mm) : 20

Bearing dimensions and specification in AST catalogue:

(dimensions in mm)

Bearing Type - Single Row

Outer Dia (D) - 29.0000

Width (B) - 20.0000

Dynamic Load Rating (Cr) - 17,100

Static Load Rating (Cor) - 25,500

Max Speed (Oil) (X1000 RPM) - 20,000

Shaft (Fw) - 21.000

Weight (g) - 35.20

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: