Sealmaster® gold mounted ball bearings feature a wide outer race insert bearing with land riding metallic retainer. The black oxide treated bearing steel insert features an exclusive lock pin and dimple system providing a direct path for lubrication into the bearing, and prevents outer ring rotation within the housing. Shaft lock is achieved by 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. Depending on your preference, these bearings are available in both inch and metric shaft sizes with a wide variety of cast iron, stamped steel or rubber mount housings, sealing, and lubrication options or industry specific solutions. Sealmaster® Pillow Block Ball Bearing Unit, Standard-Duty, Series: NP Series, 1-3/8 in Bore, 4-11/16 to 5-5/16 in Bolt Center-to-Center Length, 1-7/8 in Base to Bore Centerline, 6-9/16 in Overall Length, 1-3/4 in Overall Width, 3-3/4 in Overall Height, Two-Bolt Base Mounting, Round Bore, 1-7/8 in Base Width, Skwezloc® Concentric Collar Locking Device, Felt Seal, Non-Expansion (Fixed) Expansion, 5782 lb Dynamic Load, -40 to 200 °F, 6500 RPM Maximum, Cast Iron, Uncoated