R20-2RS Bearing 1 1/4 x 2 1/4 x 1/2 inch Sealed Ball Bearings Deep-groove geometry for high speeds and supporting both radial and axial loads Chrome steel for durability and resistance to deformity under heavy loads Reduced internal clearance for lower noise and vibration in electric motor applications Rubber seals on both sides of the bearing keep the lubricant in and contaminants out