UCF211 Bearing Dimensions
UCF211 4-bolt square flange bearing unit: 55 mm bore, 130 mm bolt centres. F211 housing + UC211 insert, designation, size-equivalent codes.
UCF211 specifications
| Shaft diameter d | 55 mm |
|---|---|
| Flange length L | 162 mm |
| Bolt hole spacing J | 130 mm |
| Insert width B | 55.6 mm |
| Mounting bolt | M16 |
| Seal / shield options | Sealed insert bearing (UC type) with cast iron housing |
| Material | Insert: GCr15 chrome bearing steel (rings and rolling elements); housing: cast iron |
| Precision | P0 (standard) |
| Radial clearance | C0 (standard); C3 on request |
| Load ratings | Load ratings for this model are being checked against FULI's catalog. Ask for them with the quote. |
Dimensions cross-checked against published catalogues; please confirm with your quote.
How to read the UCF211 designation
| Segment | Meaning |
|---|---|
| UC | Insert bearing with set-screw locking and spherical outside diameter |
| F | Four-bolt square flange housing |
| 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). |
UCF211 interchange by brand
UCF211 is a housed unit: a UC211 insert bearing in an F211 housing. The insert bearing dimensions follow ISO and interchange between manufacturers. Housing dimensions such as bolt hole spacing can differ between the JIS and ISO versions of the same designation, so please confirm the mounting dimensions with us before ordering.
| Brand | Designation |
|---|---|
| SKF | UCF 211 |
| Timken | UCF211 |
| Koyo | UCF211 |
Same designation; confirm housing bolt spacing.
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.
UCF211 compared with nearby sizes and housings
UCF211 is a square flange unit that holds the UC211 insert on a 55 mm shaft: flange length L 162 mm with M16 bolts.
The same 211 size is also made as UCP211 (pillow block unit, d 55 · H 63.5 · J 171 mm). All of them take the same UC211 insert, so a worn insert can be changed without changing the housing type.
UCF212 is the next larger size in the same series on this site: shaft d 60 mm (5 mm more), inner ring width B 65.1 mm (9.5 mm more), length L 175 mm (13 mm more) and bolt spacing J 143 mm (13 mm more).
UCF210 is the next smaller size in the same series on this site: shaft d 50 mm (5 mm less), inner ring width B 51.6 mm (4 mm less), length L 143 mm (19 mm less) and bolt spacing J 111 mm (19 mm less), and it takes M14 bolts instead of M16.
| Model | Type | Main dimensions | Weight (kg) |
|---|---|---|---|
| UCF211 | square flange unit (this page) | d 55 · L 162 · J 130 mm | — |
| UCF210 | square flange unit | d 50 · L 143 · J 111 mm | — |
| UCF212 | square flange unit | d 60 · L 175 · J 143 mm | — |
| UC211 | insert bearing | 55 × 100 × 55.6 mm (d × D × B) | 1.12 |
| UCP211 | pillow block unit | d 55 · H 63.5 · J 171 mm | 3.3 |
Dimensions in mm from the model pages; weight from FULI's catalog, — = not listed on this site.
UCF211 load ratings
FULI's catalog has no load rating line for UCF211 itself, so none is given here. The ratings of the UC211 insert are on its own page. Ask us and we send the figures with the quotation.
UCF211 dimensions in inches
The nearest common inch shaft size to the 55 mm bore of UCF211 is 2-3/16 in (55.56 mm), 0.56 mm larger than the bore, so UCF211 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 |
|---|---|---|
| Shaft diameter d | 55 mm | 2.1654 in |
| Flange length L | 162 mm | 6.3780 in |
| Bolt hole spacing J | 130 mm | 5.1181 in |
| Insert width B | 55.6 mm | 2.1890 in |
Converted at 1 in = 25.4 mm and rounded to four decimals. The bearing itself is made to the millimetre sizes.
Mounting UCF211 (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.
The UC211 insert in UCF211 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.
Bolt UCF211 down with M16 bolts at 130 mm spacing on a flat, rigid face. Line up the two housings on a shaft before tightening the bolts fully, then lock the inserts, so the shaft is not bent between them.
Grease for UCF211
The insert in UCF211 is sealed on both sides and greased at the factory. If the housing has a grease fitting, add grease slowly through it while the shaft turns until a little fresh grease shows at the seals; general practice is to relubricate more often in wet or dusty places.
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 UCF211
FULI supplies UCF211 as a complete unit, or the UC211 insert on its own for replacement. Before packing, the factory checks the mounting torque, the fit of the insert in the housing, the radial clearance and that the base-to-centre height is consistent across the batch.
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 UCF211.
Tools and guides for UCF211
Typical applications
- Conveyors
- Packaging machinery
- Agricultural machinery
- Textile machinery
FAQ
What shaft size does UCF211 fit?
A 55 mm shaft (2.1654 in).
What is the difference between UCF211 and UCF212?
UCF212 is the next size up, for a 60 mm shaft, with inner ring width B 65.1 mm (9.5 mm more), length L 175 mm (13 mm more) and bolt spacing J 143 mm (13 mm more). Choose UCF212 when the shaft is larger or the load is higher; the housings are not interchangeable.
Which insert fits UCF211?
The UC211 insert (55 × 100 × 55.6 mm). It is sold on its own for replacement.
UCF211 or UCP211: which should I use?
Both hold the same UC211 insert on a 55 mm shaft. UCF211 is a square flange unit (d 55 · L 162 · J 130 mm); UCP211 is a pillow block unit (d 55 · H 63.5 · J 171 mm). Choose by how the bearing is fixed to the machine: a pillow block bolts to a surface parallel to the shaft, a flange to a face across it.
Does UCF211 come as a complete unit or insert only?
UCF211 is normally supplied as a complete unit (insert bearing already fitted in the housing). The insert can also be quoted separately if you are replacing only the bearing.
Where are the load ratings for UCF211?
Load ratings for UCF211 are being checked against FULI's catalog and are not shown on this page yet. Model pages with a "Load ratings & speed" table carry values from FULI's catalog.