Fafnir RA100RPB1 2-Bolt Pillow Block Non-Expansion Ball Bearing Black Oxide 1"

Fafnir RA100RPB1 2-Bolt Pillow Block Non-Expansion Ball Bearing Black Oxide 1"

The Fafnir RA100RPB1 is a 2-bolt, non-expansion pillow block ball bearing unit with a black oxide finish. It consists of a pre-assembled ball bearing insert mounted in a cast iron housing, ready to bolt directly to a flat surface for shaft support. The non-expansion design means the bearing is fixed axially in the housing, locating the shaft in position rather than allowing float.

Specifications & What's Included

• Brand: Fafnir (The Torrington Company)
• Model: RA100RPB1 (also referenced as RPB1)
• Type: 2-Bolt Pillow Block, Non-Expansion
• Bearing Type: Insert Ball Bearing
• Bore Size: 1 in
• Housing Finish: Black Oxide
• Housing Material: Cast Iron
• Mounting: 2-Bolt base mount (two mounting holes on base flanges)
• Includes: Pillow block bearing unit and locking collar ring

Applications

Pillow block bearings are standard components in rotating shaft assemblies across industrial machinery, conveyors, agricultural equipment, fans, pumps, and power transmission systems. The 2-bolt pillow block configuration mounts to a flat surface or frame and supports a rotating shaft at a fixed point. The non-expansion (locating) design is used at one end of a shaft to control axial movement, while an expansion bearing at the opposite end accommodates thermal growth. Fafnir insert ball bearings of this type are widely specified in light-to-medium duty applications where easy mounting and shaft alignment are priorities. The black oxide finish provides a degree of corrosion resistance compared to bare cast iron. This bearing suits any 1-inch diameter shaft application calling for a standard 2-bolt pillow block mount.