This disc harrow bearing has a 1-1/8″square bore. The bearing comes with 2 flange housings held together with 8 rivets to keep dirt and grime out of the bearing for longer life. Our eBay Store About Us Contact Us Add to Favorite Sellers 4 of Disc Harrow Bearing 1-1/8″ Square Bore w/ 4 – 1/2″ Bolt Holes & 4-3/4″ OAL 123.95 This disc harrow bearing has a 1-1/8″square bore. The bearing comes with 2 flange housings held together with 8 rivets to keep dirt and grime out of the bearing for longer life.