Buyers Products Eccentric Locking Collar Style Pillow Block Bearings are equipped to handle high-speed applications without risking drive shaft slippage. The driveline-grade steel bearing is mounted in a cast iron housing, which helps make the pillow blocks rugged and durable. The included grease fitting ensures ease of maintenance for continual smooth operation. The simple 2 hole mounting design makes installation easy even in tight places. The eccentric locking collar means that the drive shaft will not slip, even at high RPMs. The pillow block has a self-aligning design that allows for some shaft misalignment.