Pillow Block Bearings & Insert Bearings

Choose a Complete Unit or an Insert Bearing

A pillow block unit combines a bearing insert with a housing for mounting on the machine base. The housing position and dimensions are part of the selection, not just the shaft diameter.

An insert bearing is a component used within a compatible housing. For example, the UC205 catalogue listing identifies a 25 mm bore insert with set screw locking. It should be ordered as an insert when the housing is not part of the required supply.

Keep each reference and quantity on a separate order line. Do not assume that a listing for an insert includes the housing, or that mounting bolts and other accessories are included with a complete unit.

Confirm the Shaft Size and Units

State the exact shaft diameter and whether it is metric or inch. Similar sizes are not interchangeable: 1 inch equals 25.4 mm, while a 25 mm bore is a different nominal size.

Keep the full suffix shown on the original bearing, packaging or equipment parts list. When converting units for your purchasing system, retain the original designation and avoid rounding a dimension used for fit verification.

If you are replacing an existing unit, photograph both the insert marking and housing marking where visible. These may identify different components of the assembly. A housing number alone may not establish the insert bore or the complete unit configuration.

Check Housing and Mounting Dimensions

Before approving a replacement, compare the drawing with the machine's mounting arrangement. Important dimensions include shaft centre height, bolt-hole spacing, hole or slot dimensions, overall length, housing width and available clearance around the unit.

Use the dimension symbols on the applicable drawing. If a mounting slot permits an adjustment range, confirm that range from the drawing rather than treating different manufacturers' dimensions as one broad specification.

A matching shaft bore does not prove that two complete units are direct replacements. Also check the mounting surface, locking arrangement, lubrication access and surrounding components. For a cross-brand enquiry, supply the original reference and drawing so the differences can be reviewed.

Review Locking, Alignment and Operating Conditions

Set screw locking is shown in the reviewed UCP and UC catalogue listings. Confirm the specified shaft fit and locking requirements for the selected product. Use the applicable installation instructions for screw tightening and mounting; a category description does not provide a universal torque value.

The spherical seating arrangement used in many insert-bearing units can accommodate limited alignment variation. It does not remove the need to verify the installation or justify unrestricted shaft deflection during operation.

Send operating speed, load direction, temperature and duty-cycle information with an application enquiry. Describe shock, reversing motion or vibration where relevant. Ask for the ratings and operating limits that apply to the exact insert and housing configuration.

For dusty, wet or frequently cleaned environments, identify the contamination and cleaning conditions. Confirm the sealing, housing material, lubrication arrangement and maintenance requirements rather than assuming a general-purpose unit is suitable for every environment.

Replacing Only the Bearing Insert

An insert-only replacement can be considered when the housing remains serviceable and the replacement insert is compatible. Check the bearing seat, housing condition, retention features and lubrication passage before deciding on the supply scope.

Provide the old insert reference together with the housing reference and shaft size. Confirm dimensions and locking details before approving a substitute. If the housing is damaged or its identity is uncertain, include that information in the enquiry so the complete-unit option can also be reviewed.

Information for a Wholesale or OEM Quotation

For equipment production, include the drawing revision and any requirements for marking or traceability. For distributor orders, keep metric and inch variants separate in the parts list and packaging instructions.

Private-label enquiries should include the proposed marking, packaging requirements and quantity. Minimum order quantity, availability, documentation and delivery timing should be confirmed for the exact order.

Frequently Asked Questions

Is UC205 the same product as a UCP205 unit?

No. UC205 identifies an insert bearing; a UCP205 unit includes a compatible pillow block housing. Confirm the full designation and bore when ordering either item.

Can a 25 mm unit replace a 1-inch unit?

No direct substitution should be assumed. One inch is 25.4 mm, so the nominal bore sizes differ. Match the shaft specification and full product reference.

Is the shaft diameter enough to identify a replacement?

No. Compare the housing centre height, mounting dimensions, insert configuration and locking arrangement as well as the bore.

Can I replace the insert without changing the housing?

That may be possible when the housing is serviceable and the replacement insert is compatible. Provide both component references and check the housing condition before ordering.

Are UCP, UCF and UCFL units the same mounting type?

No. These commonly refer to pillow block, square-flange and two-bolt flange arrangements respectively. Confirm the actual housing drawing and availability of the required type.

What should I send for a quotation?

Send the complete reference, shaft size, quantity, supply scope and destination. A mounting drawing is especially useful for replacements and cross-brand comparisons.

Request Your Pillow Block Bearing Quotation

Share your bearing list or installation drawing with Nexans Bearing to review the required configuration and request pricing.