Buyers Products Set Screw Style Pillow Block Bearings are built for long life with simple installation and maintenance. 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. Its set screw design ensures that shaft slippage is avoided.