Needle roller bearing
Needle roller bearings are roller bearings with tiny cylindrical rollers. Their peculiarity is that the needle rollers come in contact with the outer ring on a larger surface compared to the ball bearings. In addition, the difference between the exterior and internal diameter of the bearings is very small, which allows them to be integrated into small places.
HK: Open -end, deep pulled ring -to -needle bearing
BK: closed -end, deep pulled ring -to -needle bearing
Na, nki: bearing with an inner running ring
Rna, nk: bearing without an inner running ring