Pillow Block Bearing Size Chart (Complete UCP / UELP Series in mm)

Pillow block bearings are mounted bearing units that include insert ball bearings and a pillow-shaped housing as the supported elements. Many people may think plummer block bearings are the same as pillow block bearings. This is incorrect. Pillow block bearings are usually the UCP and UELP series, while plummer block bearings are SN, SNL, SAF, and SD series, which have heavier bearing housings for larger and heavier machines.

If you are looking for pillow block bearings and want to check the series number with the sizes, or if you already have the series numbers and want to check the sizes, you are in the correct place. Here, we will list all the common pillow block bearing sizes for you to check.

And if you are looking for a pillow block bearing manufacturer, you can contact BKZ Industry. We offer all the pillow block bearings listed here, as well as other bearings not listed. Watch the video below to see some pillow block bearings we offered.

Now, let’s check the pillow block bearing size chart.

Pillow Block Bearing Sizes in MM

Tip: This size chart is very long. You can hold Ctrl + F on Windows or Command + F on Mac and enter a keyword such as the size or bearing number to quickly locate the position.

UCP vs UELP: What Are Their Differences?

To understand UCP and UELP, you need to first understand what these letters and numbers mean. Take UCP201 and UELP201 as examples.

UCP201 Meaning

So, UCP201 means a pillow block bearing unit made with a UC201 insert bearing and a P-type pillow block housing.

UELP201 Meaning

So, UELP201 means a pillow block bearing unit made with a UEL201 insert bearing and a P-type pillow block housing.

Key Difference Between UCP and UELP

So, the main difference is not the housing. Both UCP and UELP use a P-type pillow block housing. The real difference is the insert bearing inside:

UCP = UC insert bearing + P housing
 UELP = UEL insert bearing + P housing

In simple words, UCP uses set screws to lock the bearing onto the shaft, while UELP uses an eccentric locking collar.

Flange Pillow Block Bearing vs Pillow Block Bearing

In fact, there is no standard bearing name called flange pillow block bearing. The correct technical name is usually flange bearing unit or flanged mounted bearing unit.

Flange bearing units include series such as UCF, UCFL, UCFC, UCFA, UELF, and UELFL. They have bolt holes on the flange, so they can be fixed onto a machine wall, side plate, vertical frame, or equipment panel.

Pillow block bearings usually refer to UCP or UELP series. They use a P-type pillow block housing and are mounted from the bottom onto a machine base or horizontal surface.

The major difference between flanged bearing units and pillow block bearings is the housing shape and installation position. Flanged bearing units use a flanged housing and are mounted from the face, while pillow block bearings use a P-type housing and are mounted from the bottom.

Here are two images to help you compare and understand their differences.

If you still have no idea, you can watch these two videos to compare and understand.

Final Words

With this pillow block bearing dimension chart, you can quickly check the pillow block bearing sizes and model numbers you need. If you need to purchase pillow block bearings in bulk, contact BKZ Industry directly. With 2 factories and ISO 9001 certification, we can supply almost all common pillow block bearing types and sizes for your application.