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