NK21/20 SKF Needle Roller Bearing 21x29x20

NK21/20 SKF Needle Roller Bearing 21x29x20 Without Inner Ring

Needle roller bearings with machined rings made of bearing steel have a low sectional height and a high load carrying capacity. They can be used with or without an inner ring. Needle roller bearings without an inner ring will require the shaft to be hardened and ground.

The most popular ranges in this product type are:

• NK, NKS, RNA series - Without Inner Rings
• RNA.....-2RS - Without Inner Rings but with integral lip seals
• NKI, NA, NKIS - With Inner Rings
• NA.....-2RS - With Inner Rings and integral lip seals 

 Other types available on request include:

• RNAO - Needle Roller Bearing without ribs and without inner ring
• NAO - Needle Roller Bearing without ribs but with inner ring
• RPNA - Aligning Needle Roller Bearing without inner ring
• PNA - Aligning Needle Roller Bearing with inner ring

NK21/20-SKF dimension chart - all dimensions in mm unless indicated.

d	D	B	Dynamic Load (kN)	Static Load (kN)	Reference speed (r/min)	Limiting speed (r/min)
21	29	20	17,2	27	19000	22000