All Bearings and Belts Products / Pillow Block Bearing Units
Pillow Block Bearings — A pillow block bearing is a mounted insert in a two-bolt or four-bolt housing that bolts to a flat base so the shaft stays aligned.
Product listings are below. Questions sit under the listings so you can shop first.
A pillow block bearing is a mounted insert in a two-bolt or four-bolt housing that bolts to a flat base so the shaft stays aligned.
What is a pillow block bearing?
A pillow block bearing is a mounted unit: an insert bearing locked in a housing that bolts to a machine base. USA Bearings lists UCP-style units by shaft size so you can match bore, lock style, and housing, then order one piece or a commercial quantity.
- Use the product list on this page once you know the shaft diameter.
- Call 863-337-4984 if two listings look close or the housing bolt pattern is worn off.
How to measure pillow block bearing size?
Measure the shaft diameter first (that is the bore), then the bolt-hole spacing on the base and the housing height if you are matching an existing unit. A 1-inch shaft is not the same listing as a 1-1/4-inch shaft.
- A photo of the old unit plus any stamped number speeds a fit check.
- 1-inch pillow blocks are listed as their own size family when you need that modifier.
What are the common problems with pillow blocks?
The usual failures are a worn insert, a loose set-screw or eccentric collar, a cracked housing, or a unit that was the wrong lock style for the shaft. Replace the whole unit when the housing is damaged; swap the insert when the housing is still sound.
What is the difference between a mounted bearing and a loose insert?
A mounted pillow or flange unit is ready to bolt down. An insert (UC, SER, and similar) is the bearing only and needs a housing. If you already have a good housing, shop inserts. If the housing is gone, shop the full pillow or flange unit.
