NK21/20  precision needle roller bearing drawings
  1. The bearing must be used with a hardened inner ring, or a hardened shaft.
  2. Some sizes are available with either a single seal or two seals.

NK21_20 Metric Series Needle Roller Bearing

Model: NK21/20

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Product Details

Bearing Type Single Row
Outer Dia (D) 29.000 mm
Width (B) 20.000 mm
Dynamic Load Rating (Cr) 17,100 N
Static Load Rating (Cor) 25,500 N
Max Speed (Oil) 20,000 rpm
Shaft (Fw) 21.00 mm
Weight (g) 35.20 grams
Material 52100 Chrome steel, or equivalent