What does a "K" designation on a bearing indicate?

The "K" designation on a bearing signifies the type of adapter sleeve used. In this context, it specifically indicates a tapered adapter sleeve that is designed to secure the bearing on a shaft without the need for a locking collar. Tapered adapter sleeves provide a simple and effective means for mounting bearings with precision, ensuring the correct fit and alignment on the shaft. The taper allows for easy installation and removal, making maintenance more efficient, as well as reducing the risk of damaging the bearing during these processes.

Understanding this designation is important for millwrights and others in power transmission, as selecting the appropriate bearing and mounting method can directly impact the performance and reliability of machinery.