UC211 Bearing Dimensions
UC211 insert bearing: 55 mm bore, 100 mm spherical OD, 55.6 mm width, set-screw lock (FULI catalog). Fits P211/F211/FL211/T211 housings. Quote.
UC211 specifications
| Bore d | 55 mm |
|---|---|
| Outside diameter D | 100 mm |
| Inner ring width B | 55.6 mm |
| Outer ring width C | 25 mm |
| Seal / shield options | Sealed insert bearing (UC type), spherical outside diameter, set-screw locking |
| Material | GCr15 chrome bearing steel (rings and rolling elements) |
| Precision | P0 (standard) |
| Radial clearance | C0 (standard); C3 on request |
Dimensions from FULI's catalog.
Load ratings & speed
| Dynamic load rating Cr | 43.5 kN |
|---|---|
| Static load rating C0r | 29.3 kN |
| Limiting speed, shaft js7 / j7 | 2,700 rpm |
| Limiting speed, shaft h7 | 2,000 rpm |
| Weight | 1.12 kg — approx. |
Values from FULI's catalog; confirm for your application.
How to read the UC211 designation
| Segment | Meaning |
|---|---|
| UC | Insert bearing with set-screw locking and spherical outside diameter |
| 2 | 200 series (light duty) |
| 11 | Bore code 11 → 55 mm bore. ISO bore code (00–03 = 10/12/15/17 mm; 04 and above = code × 5 mm). |
UC211 interchange
UC211 is an ISO designation. The boundary dimensions are identical across manufacturers; only suffixes (seals, clearance, cage) differ.
Brand numbers for UCP, UCF and UCFL units: Pillow Block Bearing Cross Reference.
Brand names are trademarks of their respective owners. FULI is not affiliated with, authorized by or endorsed by these companies. Part numbers are shown for interchange reference only. FULI dimensions, load ratings and speeds come from the FULI catalog.
UC211 compared with nearby sizes and housings
UC211 is a set-screw insert for a 55 mm shaft: outside diameter 100 mm, inner ring width 55.6 mm and outer ring width 25 mm.
The UC211 insert is the one fitted in UCP211 (pillow block unit) and UCF211 (square flange unit).
UC212 is the next larger size in the same series on this site: shaft d 60 mm (5 mm more), outside diameter D 110 mm (10 mm more) and inner ring width B 65.1 mm (9.5 mm more).
UC210 is the next smaller size in the same series on this site: shaft d 50 mm (5 mm less), outside diameter D 90 mm (10 mm less) and inner ring width B 51.6 mm (4 mm less).
| Model | Type | Main dimensions | Weight (kg) |
|---|---|---|---|
| UC211 | insert bearing (this page) | 55 × 100 × 55.6 mm (d × D × B) | 1.12 |
| UC210 | insert bearing | 50 × 90 × 51.6 mm (d × D × B) | 0.80 |
| UC212 | insert bearing | 60 × 110 × 65.1 mm (d × D × B) | 1.54 |
| UCP211 | pillow block unit | d 55 · H 63.5 · J 171 mm | 3.3 |
| UCF211 | square flange unit | d 55 · L 162 · J 130 mm | — |
Dimensions in mm from the model pages; weight from FULI's catalog, — = not listed on this site.
UC211 weight, load ratings and speed
FULI's catalog gives about 1.12 kg for the insert, so 100 pieces of UC211 weigh about 112 kg before packing.
The catalog lists UC211 with a dynamic load rating of 43.5 kN and a static load rating of 29.3 kN. Its speed limits depend on the shaft tolerance: 2,700 rpm on a js7 or j7 shaft and 2,000 rpm on an h7 shaft. A closer shaft fit holds the inner ring more evenly, which is why the js7 / j7 figure is higher.
Values from FULI's catalog; confirm for your application.
UC211 dimensions in inches
The nearest common inch shaft size to the 55 mm bore of UC211 is 2-3/16 in (55.56 mm), 0.56 mm larger than the bore, so UC211 will not go on it. An inch shaft needs an inch bore insert. Inch bore versions are made for some sizes; ask us with the shaft size.
| Dimension | Millimetres | Inches |
|---|---|---|
| Bore d | 55 mm | 2.1654 in |
| Outside diameter D | 100 mm | 3.9370 in |
| Inner ring width B | 55.6 mm | 2.1890 in |
| Outer ring width C | 25 mm | 0.9843 in |
Converted at 1 in = 25.4 mm and rounded to four decimals. The bearing itself is made to the millimetre sizes.
Mounting UC211 (general guidance)
General guidance, not a FULI specification: insert bearings slide onto the shaft rather than being pressed on, and are held by their locking device. A shaft ground or drawn to h7 is common; a closer shaft such as js7 or j7 suits higher speed. For UC211 the catalog gives 2,700 and 2,000 rpm for the two cases.
UC211 is locked by set screws in the extended inner ring. Housed-unit problems usually start at the set screws: if the inner ring is not held, it turns on the shaft and wears it. Tighten each screw to the torque in the mounting instructions, and check them again after the first hours of running.
The spherical outside diameter of UC211 lets the insert swivel in the housing seat while it is being mounted, which takes up small errors in shaft line. It does not make the bearing a self-aligning bearing in service.
Grease for UC211
The insert is sealed on both sides and greased at the factory. Fitted in a housing with a grease fitting, it can be relubricated through the housing; on its own it runs on the factory fill.
Greases for a stated temperature range can be specified on the order; for North America a range of −40 to 120 °C is often asked for.
How FULI supplies UC211
FULI supplies UC211 on its own as a replacement insert, or fitted in a housing as a complete unit. The rings and balls are GCr15 chrome steel and the radial clearance is C0 as standard, with C3 on request.
Rings are marked with a brand you are authorised to use, with the FULI brand, or left neutral, as your order states. The box is printed with the model, precision class and brand.
Inquiries that leave out the prefix or suffix letters are the usual cause of a wrong quote, so write the full designation, for example UC211.
Tools and guides for UC211
Typical applications
- Replacement inserts for UCP / UCF / UCFL housings
- Conveyors
- Agricultural machinery
FAQ
What shaft size does UC211 fit?
A 55 mm shaft (2.1654 in).
What is the difference between UC211 and UC212?
UC212 is the next size up, for a 60 mm shaft, with outside diameter D 110 mm (10 mm more) and inner ring width B 65.1 mm (9.5 mm more). Choose UC212 when the shaft is larger or the load is higher; the housings are not interchangeable.
Which housings fit the UC211 insert?
UCP211 (pillow block unit) and UCF211 (square flange unit) all use UC211. Order UC211 on its own to replace a worn insert in any of them.
How much does UC211 weigh?
About 1.12 kg in FULI's catalog; 100 pieces weigh about 112 kg before packing.
Can UC211 be ordered as an insert only, or as a complete unit?
Both. UC211 can be supplied on its own as a replacement insert for an existing housing, or fitted in a housing such as the UCP211 pillow block or UCF211 square flange and supplied as a complete unit. Tell us which you need when you send the inquiry.