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Cast iron pillow block bearing with double-sealed radial ball insert 1-15/16 inch bore

Sealmaster

Sealmaster MP-31 Pillow Block Bearing 1-15/16" Bore

SKU CH-NNX5-AQV0D

A cast-iron pillow block bearing with a 1-15/16" cylindrical bore and double-sealed radial ball insert for bolt-through mounting

  • Product typeTarps
  • Supports heavy radial loads with 1-15/16 in cylindrical bore
  • Cast iron housing withstands shock and vibration in mounting
  • Double-sealed closure keeps contaminants out of bearing race
  • Operates reliably from -20 to 220 Degrees F
  • Two bolt-through holes on 7 35/64 in centres simplify installation

Sealmaster MP-31 Pillow Block Bearing

This Sealmaster MP-31 pillow block bearing uses a 1-15/16 in cylindrical bore to mount on shafts in industrial machinery. The cast iron housing holds a radial ball insert made from alloy steel. It suits maintenance teams replacing worn units on conveyors, fans or agricultural equipment where a two-bolt footprint is required.

Operating limits of the bearing insert

The double-sealed radial ball insert comes lubricated with an NLGI #2 equivalent grease. It is rated for continuous operation between -20 °F and 220 °F. Exceeding this temperature range or exposing the seals to aggressive chemicals can reduce service life.

Verify shaft and mounting dimensions before ordering

Confirm the shaft diameter matches the 1-15/16 in bore and that the mounting surface accepts a 7 35/64 in bolt-hole centre distance with two holes. The base measures 2.88 in wide and the overall height is 5.093 in. This unit is not for applications needing a four-bolt base or a different bore size.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $284.99
Pricier than about 91% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameSEALMASTER
Product typeTarps

Questions about this item

How do I decide between the listed versions or capacities for the Sealmaster MP-31 pillow block bearing?

This listing covers a single 1-15/16 in bore size with a 2.88 in base width and 5.093 in overall height. If your shaft matches that bore and the two-bolt 7 35/64 in mounting pattern fits, this is the correct version.

What does the 220 °F maximum temperature mean for real-world operation of this bearing?

The alloy-steel radial ball insert with NGLI #2 equivalent grease is rated to 220 °F continuous. In a running machine, keep the housing surface well below that limit; sustained higher heat will degrade the lubricant and shorten seal life.

How does the bolt-through mount and double-sealed closure cap the bearing's speed and contamination resistance?

The two-bolt through-mount on a 7 35/64 in center pattern locks the cast-iron housing rigidly, while the double-sealed closure keeps out dust and moisture. Speed is limited by the grease fill and seal drag rather than the mounting style.

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