Sealmaster® gold mounted ball bearings feature wide outer race insert bearing with a land riding metallic retainer. The black oxide treated bearing steel insert features an exclusive lock pin and dimple system. This provides a direct path for lubrication into the bearing. It also helps prevent outer ring rotation. Available with either setscrew or Skwezloc®concentric locking collar. The felt seal with flinger provide a good balance between contaminant entry, GoldPlex®HP grease loss and friction. Sealmaster® Ball Bearing Cartridge Unit, Non-Expansion Medium Duty Round/Straight Bore, Series: MFCD, 3-15/16 in Bore, 9-3/8 in Diameter Bolt Circle, 4-Bolt Piloted Flange Mounting, 10-7/8 in Overall Length/Diameter, 5-3/8 in Overall Depth, 10-7/8 in Overall Height, Double Setscrew Locking Device, 52100 Steel Bearing, Felt Seal, 29905 lb Dynamic/23553 lb Static Load, 2400 RPM Maximum, -20 to 220 °F, Uncoated