UCF209 Bearing Dimensions
UCF209 4-bolt square flange bearing unit: 45 mm bore, 105 mm bolt centres. F209 housing + UC209 insert, designation, size-equivalent codes.
UCF209 specifications
| Shaft diameter d | 45 mm |
|---|---|
| Flange length L | 137 mm |
| Bolt hole spacing J | 105 mm |
| Insert width B | 49.2 mm |
| Mounting bolt | M14 |
| 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 UCF209 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) |
| 09 | Bore code 09 → 45 mm bore. ISO bore code (00–03 = 10/12/15/17 mm; 04 and above = code × 5 mm). |
UCF209 interchange by brand
UCF209 is a housed unit: a UC209 insert bearing in an F209 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 209 |
| Timken | UCF209 |
| Koyo | UCF209 |
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.
UCF209 compared with nearby sizes and housings
UCF209 is a square flange unit that holds the UC209 insert on a 45 mm shaft: flange length L 137 mm with M14 bolts.
The same 209 size is also made as UCP209 (pillow block unit, d 45 · H 54 · J 146 mm). All of them take the same UC209 insert, so a worn insert can be changed without changing the housing type.
UCF210 is the next larger size in the same series on this site: shaft d 50 mm (5 mm more), inner ring width B 51.6 mm (2.4 mm more), length L 143 mm (6 mm more) and bolt spacing J 111 mm (6 mm more).
UCF208 is the next smaller size in the same series on this site: shaft d 40 mm (5 mm less), inner ring width B 49.2 mm (the same) and bolt spacing J 102 mm (3 mm less).
| Model | Type | Main dimensions | Weight (kg) |
|---|---|---|---|
| UCF209 | square flange unit (this page) | d 45 · L 137 · J 105 mm | — |
| UCF208 | square flange unit | d 40 · J 102 mm (JIS) | 1.9 |
| UCF210 | square flange unit | d 50 · L 143 · J 111 mm | — |
| UC209 | insert bearing | 45 × 85 × 49.2 mm (d × D × B) | 0.68 |
| SA209 | insert bearing | 45 × 85 × 30.2 mm (d × D × B) | — |
| UCP209 | pillow block unit | d 45 · H 54 · J 146 mm | 2.2 |
Dimensions in mm from the model pages; weight from FULI's catalog, — = not listed on this site.
UCF209 load ratings
FULI's catalog has no load rating line for UCF209 itself, so none is given here. The ratings of the UC209 insert are on its own page. Ask us and we send the figures with the quotation.
UCF209 dimensions in inches
The nearest common inch shaft size to the 45 mm bore of UCF209 is 1-3/4 in (44.45 mm), 0.55 mm smaller than the bore, so UCF209 would be loose 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 | 45 mm | 1.7717 in |
| Flange length L | 137 mm | 5.3937 in |
| Bolt hole spacing J | 105 mm | 4.1339 in |
| Insert width B | 49.2 mm | 1.9370 in |
Converted at 1 in = 25.4 mm and rounded to four decimals. The bearing itself is made to the millimetre sizes.
Mounting UCF209 (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 UC209 insert in UCF209 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 UCF209 down with M14 bolts at 105 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 UCF209
The insert in UCF209 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 UCF209
FULI supplies UCF209 as a complete unit, or the UC209 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 UCF209.
Tools and guides for UCF209
Typical applications
- Conveyors
- Packaging machinery
- Agricultural machinery
- Textile machinery
FAQ
What shaft size does UCF209 fit?
A 45 mm shaft (1.7717 in).
What is the difference between UCF209 and UCF210?
UCF210 is the next size up, for a 50 mm shaft, with inner ring width B 51.6 mm (2.4 mm more), length L 143 mm (6 mm more) and bolt spacing J 111 mm (6 mm more). Choose UCF210 when the shaft is larger or the load is higher; the housings are not interchangeable.
Which insert fits UCF209?
The UC209 insert (45 × 85 × 49.2 mm). It is sold on its own for replacement.
UCF209 or UCP209: which should I use?
Both hold the same UC209 insert on a 45 mm shaft. UCF209 is a square flange unit (d 45 · L 137 · J 105 mm); UCP209 is a pillow block unit (d 45 · H 54 · J 146 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 UCF209 come as a complete unit or insert only?
UCF209 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 UCF209?
Load ratings for UCF209 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.