What is a pillow block bearing?
A pillow block bearing (also called a mounted bearing unit or Y-bearing unit) combines a bearing insert with a housing that bolts directly onto a machine frame. Because the housing is already machined to take the insert, installation is quick and no separate housing bore has to be produced.
Inserts are usually wide-inner-ring ball bearings with a spherical outside diameter, so they can compensate for small misalignment when mounted. They are fixed to the shaft with set screws, an eccentric locking collar or an adapter sleeve, and most are sealed and pre-greased. Common housing styles are the standard pillow block (UCP), square and oval flange units (UCF, UCFL), take-up units (UCT) and adapter-sleeve versions (UKP).
When an insert wears out, you can usually replace only the insert and keep the housing. Send us the designation printed on the housing and insert, or the shaft diameter and housing style, and we will quote the right unit.
Typical applications
- Belt & roller conveyors
- Agricultural machinery
- Fans & blowers
- Food & packaging lines
- Textile & woodworking machines
- Mining & material handling
- Mixers, dryers & general plant equipment
Key features & benefits
- Ready to mount: insert and housing in one unit
- Spherical outside diameter compensates initial misalignment
- Sealed and pre-greased, many with a grease nipple
- Simple shaft locking with set screws or collar
- Replaceable inserts cut maintenance cost
- Housing styles for floor, wall and take-up mounting
Available series
Housing styles and shaft sizes in stock: [confirm stocked UCP/UCF/UCFL/UCT/UKP series and shaft sizes]
Need split plummer block housings for larger shafts? See our Cast Iron Housings.
How to order
- Send the part number, dimensions or a drawing, plus the quantity you need.
- Our team checks availability and suitable equivalents for your application.
- You receive a quotation with price and delivery time (typically 7–30 days).
