The BK series is a type of drawn cup needle roller bearing with closed ends, featuring a thin-walled outer ring (drawn cup) and sealed ends. This design integrates needle rollers and a cage within a stamped steel cup, with both ends of the bearing closed by metal seals or shields. The closed ends provide effective protection against dust, debris, and lubricant leakage, making the bearing suitable for contaminated environments. The BK series is characterized by its compact radial dimensions, light weight, and cost-effectiveness, and is commonly used in applications with limited space and moderate speed and load requirements.
