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Koyo HK Metric Needle Roller Bearing
Koyo HK Caged Metric Needle Bearings
The basic design of needle rollers bearings is the same as the NA and NK type cylindrical roller. For those applications where minimal cross section height is required. The rollers of needle bearings are longer and smaller in diameter than cylindrical rollers. Needle roller bearing cannot carry thrust loading but have relatively high radial capacity.
Needle rollers are available in different styles with and without inner rings and seals. When used without inner rings the shaft is heat treated and ground to function as the raceway surface. HK is a drawn cup needle roller bearing that uses an outer ring shell that forms a cup with no additional machining performed. Drawn cup needle bearings are available with open ends or a single closed end to seal and protect the end of the shaft. The drawn cup design is also made with a cage or as a full complement without a cage. The HK metric needle roller bearing has caged needles and the cage material is pressed steel.
The basic design of needle rollers bearings is the same as the NA and NK type cylindrical roller. For those applications where minimal cross section height is required. The rollers of needle bearings are longer and smaller in diameter than cylindrical rollers. Needle roller bearing cannot carry thrust loading but have relatively high radial capacity.
Needle rollers are available in different styles with and without inner rings and seals. When used without inner rings the shaft is heat treated and ground to function as the raceway surface. HK is a drawn cup needle roller bearing that uses an outer ring shell that forms a cup with no additional machining performed. Drawn cup needle bearings are available with open ends or a single closed end to seal and protect the end of the shaft. The drawn cup design is also made with a cage or as a full complement without a cage. The HK metric needle roller bearing has caged needles and the cage material is pressed steel.