Needle roller bearings are roller bearings with cylindrical rollers. The rollers are thin and long relative to their diameter.
This type of roller is called a needle roller. Despite having a smaller cross-section, the bearing still has a higher load bearing capacity. The radial structure is compact. When the inner diameter size and load capacity are the same as other types of bearings, the outer diameter is the smallest. It is especially suitable for the support structure with limited radial installation size.