The HK Series Stamped Needle Roller Bearings are a type of drawn cup needle roller bearing characterized by a thin, precision-formed stamped outer ring. This outer ring serves a dual purpose: it acts as the outer raceway for the needle rollers and provides a ready-to-install housing. Internally, it contains a full complement of needle rollers retained by a cage. The primary advantages of this design are its extremely economical cost, light weight, and the fact that it allows for a simple, unhardened housing bore because the hardened outer ring itself acts as the raceway. This makes HK bearings a popular choice for high-volume applications where cost-effectiveness and compact design are critical.
