Machined ring needle roller bearings
Single-row			Double-row
With inner ring	Without inner ring	Sealed	With inner ring	Without inner ring
NA4800 NA4900 NA5900 (NQI, NQIS) RNA4800 RNA4900 RNA5900 (NQ, NQS)   NA4900UU			NA6900 RNA6900

Needle roller and cage assemblies Single-row Double-row R RS V VS WR WV

Drawn cup needle roller bearings With open ends With closed end Full complement type  BM With cage  BTM   BHTM Full complement type  MM With cage  MKM   MHKM

In spite of their basic structure, which is the same as that of NU type cylindrical roller bearings, bearings with minimum ring sections offer space savings and greater resistance to radial load, by using needle rollers. Bearings with no inner rings function using heat-treated and ground shafts as their raceway surface.