Cylinder roller bearings and needle roller bearings are compared to its diameter, where the roller is long and thin, which is dubbed needles. Even though they posses a smaller cross section, they boast a higher transfer capacity hence they are particularly suited for the radial area space restricted applications. Needle roller bearings are divided into 1 Radial needle roller and cage assemblies 2.NA, NKI-type needle roller bearings 3.RNA, NK-type needle roller bearings without inner ring 4.HK Needle roller bearings 5.BK Needle roller bearings. owing to the long and thin design of the needle, the radial structure is rather small and its diameter is similar to other types of carrying capacity.
The outer ring nitrogen of these needle roller bearings at superior temperature hardening. They offers superior wear resistance. They can grease an expansive area and offer long term lithium grease lubrication and elongated lubrication periods. The ring architecture is crafted from nitrile rubber of ST12, while functional temperature range is from -30 ° C to 100 ° C or -30 ° C.