Industrial MSPD-31 Seal Master Bearing Assembly

Sealmaster MSPD-31 Gold Line mounted two-bolt pillow block bearing, cast iron housing, fixed (non-expansion) with a 1-15/16 in bore. The replaceable inner insert is 52100 bearing steel with a black oxide finish and standard clearance, designed for medium‑duty service and paired with a wide outer ring that increases grease capacity to help absorb shock loads. It features a felt labyrinth seal with a seal flinger, and is relubricatable using GoldPlex-HP grease via a lubrication fitting. The bore is 1.9375 in (1-15/16 in); the base provides two mounting holes with bolt centers spaced 7.1250–8.3750 in; overall length is 10.0000 in, height 5.4375 in, base width 2.6250 in, and overall width 1.2188 in; bolt size is 0.625 in. Replacement bearing insert part number is 3-115D. This MSPD-31 unit is part of Sealmaster’s Gold Line and is specified for medium‑duty, non‑expansion mounted bearing applications in industrial equipment.