Linear Ball Bearing IP32G-OP 2.00" OpenLinear ball bearing, open shelled, with a 2" inner diameter (ID). The open design allows use with supported shafting while the ball bearing design provides smooth, accurate linear motion with a low coefficient of friction. It offers an advantage in cantilevered applications where plain bearings may be limited by the 2: 1 binding rule. The heat treated alloy steel shell provides durability, the balls deliver speed, and the polymer resin retainer guides