HF One Way Needle Roller Bearings: Designed to fit on a 4mm shaft. Commonly used in industrial and remote control model applications. One Way Clutch Needle Roller Bearing with 2 open ends. Designed to transmit torque in one direction and freewheel in the opposite direction. Arrow denotes rotation direction.
HK Drawn Cup Needle Roller Bearings: A Drawn cup type needle roller bearing. No inner race, needle roller bearings with a deep drawn thin-walled outer ring with open ends. As used in many industrial applications and swing arm linkages.
NK Needle Roller Bearings: NK needle roller bearings are supplied without the inner ring for instances where a mating bearing surface already exists or an inner ring is to be used & has the benefit of flanges in the outer race to compensate for small misalignments and small side loads.
RNA Needle Roller Bearings: RNA needle roller bearings with flanges (annular rings) in the outside housing to locate the needle roller cage, generally of a single row of rollers design.
TA Open End Needle Roller Bearings: Supplied in the excellent IKO brand. TA open end needle roller bearings with a deep drawn thin-walled outer ring with open ends. They are characterized by low sectional height and high load carrying ability. They are ideal where a very compact and economical bearing arrangement is required.