Pillow Block Bearing Shaft Size
Enter your shaft diameter to get the matching UCP, UCF and UCFL unit numbers, insert bearing and bolt size. Covers 20 to 45 mm and common inch shafts.
Find your shaft diameter in the left column, then read across to the insert bearing and the bolt size for the housing style you need.
Shaft size to unit number (20 to 45 mm bore)
| Shaft (mm) | Insert | UCP (pillow block), bolt | UCF (flange, square), bolt | UCFL (flange, oval), bolt |
|---|---|---|---|---|
| 20 | UC204 | UCP204, M10 | UCF204, M10 | UCFL204, M10 |
| 25 | UC205 | UCP205, M10 | UCF205, M10 | UCFL205, M14 |
| 30 | UC206 | UCP206, M14 | UCF206, M10 | UCFL206, M14 |
| 35 | UC207 | UCP207, M14 | UCF207, M12 | UCFL207, M14 |
| 40 | UC208 | UCP208, M14 | UCF208, M14 | UCFL208, M14 |
| 45 | UC209 | UCP209, M14 | UCF209, M14 | confirm at quotation |
The insert column is common to every housing style at that bore — see insert bearing for the full UC size range and the SB and SA variants.
Reading the result
Once you have the unit number, check pillow block bearing, flange bearing or mounted bearing for the full dimensions and to confirm the housing is in stock at that size. For inch shafts, see the mm to inch bearing converter.
Send the shaft diameter, housing style and quantity to sales@fuli-bearings.com or use the request a quote form for a confirmed unit number and lead time.
FAQ
What if my shaft is between two sizes on the table, such as 32 mm?
Mounted units are only made in the listed bore steps, so a 32 mm shaft needs either a bushing sleeve to step it down to 30 mm or a machined reduction to the next size down. Send the exact shaft diameter with your inquiry and we confirm the right fit.
Does the same shaft size always need the same bolt size across UCP, UCF and UCFL?
No. Bolt size depends on the housing style as well as the bore, because each housing style has its own base or flange thickness. Use the column for the housing style you need, not just the bore row.
Can I use this table for inch shafts?
Convert the inch shaft to millimetres first (for example 1 inch = 25.4 mm) and read the nearest metric row, or see the mm to inch bearing converter for standard inch insert designations such as UC205-16.