Sealmaster® gold ER bearings feature a cylindrical OD and snap ring for easy installation in a roll assembly. Shaft lock is achieved by either set screw or Skwezloc® concentric locking collar. The felt seal with flinger provide a good balance between contaminant entry, GoldPlex® HP™ grease loss and friction. Depending on your preference, these bearings are available in both inch and metric shaft sizes with a wide variety of sealing and lubrication options or ERX-TREME industry specific solutions. Sealmaster® Mounted Ball Bearing Insert Only, Non-Expansion Standard Duty Straight Bore, Series: ER Series, 20 mm Bore Dia, 31 mm W, Cut Down Felt Labyrinth Closure, 1444 lb Static/2611 lb Dynamic, 52100 Steel Bearing, Brass Cage, 2900 RPM Maximum, 220 °F, Black Oxide