UCFL326 Bearing Dimensions
UCFL326 2-bolt oval flange bearing unit: 130 mm bore, 460 mm bolt centres. FL326 housing + UC326 insert, designation, size-equivalent codes.
UCFL326 specifications
| Shaft diameter d | 130 mm |
|---|---|
| Flange length L | 550 mm |
| Bolt hole spacing J | 460 mm |
| Flange width H | 360 mm |
| Insert width B | 135 mm |
| Mounting bolt | M42 |
| 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 UCFL326 designation
| Segment | Meaning |
|---|---|
| UC | Insert bearing with set-screw locking and spherical outside diameter |
| FL | Two-bolt oval flange housing |
| 3 | 300 series (medium duty) |
| 26 | Bore code 26 → 130 mm bore. ISO bore code (00–03 = 10/12/15/17 mm; 04 and above = code × 5 mm). |
UCFL326 interchange
UCFL326 is a housed unit: a UC326 insert bearing in an FL326 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 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.
UCFL326 compared with nearby sizes and housings
UCFL326 is a oval flange unit that holds the UC326 insert on a 130 mm shaft: flange length L 550 mm and flange width H 360 mm with M42 bolts.
The same 326 size is also made as UCP326 (pillow block unit, d 130 · H 180 · J 480 mm). All of them take the same UC326 insert, so a worn insert can be changed without changing the housing type.
UCFL328 is the next larger size in the same series on this site: shaft d 140 mm (10 mm more), inner ring width B 145 mm (10 mm more), length L 600 mm (50 mm more) and bolt spacing J 500 mm (40 mm more), and it takes M45 bolts instead of M42.
UCFL321 is the next smaller size in the same series on this site: shaft d 105 mm (25 mm less), inner ring width B 112 mm (23 mm less), length L 440 mm (110 mm less) and bolt spacing J 360 mm (100 mm less), and it takes M39 bolts instead of M42.
| Model | Type | Main dimensions | Weight (kg) |
|---|---|---|---|
| UCFL326 | oval flange unit (this page) | d 130 · L 550 · J 460 mm | — |
| UCFL321 | oval flange unit | d 105 · L 440 · J 360 mm | — |
| UCFL328 | oval flange unit | d 140 · L 600 · J 500 mm | — |
| UC326 | insert bearing | 130 × 280 × 135 mm (d × D × B) | — |
| UCP326 | pillow block unit | d 130 · H 180 · J 480 mm | — |
Dimensions in mm from the model pages; weight from FULI's catalog, — = not listed on this site.
UCFL326 load ratings
FULI's catalog has no load rating line for UCFL326 itself, so none is given here. The ratings of the UC326 insert are on its own page. Ask us and we send the figures with the quotation.
UCFL326 dimensions in inches
The nearest common inch shaft size to the 130 mm bore of UCFL326 is 5-1/8 in (130.18 mm), 0.18 mm larger than the bore, so UCFL326 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 | 130 mm | 5.1181 in |
| Flange length L | 550 mm | 21.6535 in |
| Bolt hole spacing J | 460 mm | 18.1102 in |
| Flange width H | 360 mm | 14.1732 in |
| Insert width B | 135 mm | 5.3150 in |
Converted at 1 in = 25.4 mm and rounded to four decimals. The bearing itself is made to the millimetre sizes.
Mounting UCFL326 (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 UC326 insert in UCFL326 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 UCFL326 down with M42 bolts at 460 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 UCFL326
The insert in UCFL326 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 UCFL326
FULI supplies UCFL326 as a complete unit, or the UC326 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 UCFL326.
Tools and guides for UCFL326
Typical applications
- Conveyors
- Packaging machinery
- Agricultural machinery
- Textile machinery
FAQ
What shaft size does UCFL326 fit?
A 130 mm shaft (5.1181 in).
What is the difference between UCFL326 and UCFL328?
UCFL328 is the next size up, for a 140 mm shaft, with inner ring width B 145 mm (10 mm more), length L 600 mm (50 mm more) and bolt spacing J 500 mm (40 mm more). It takes M45 bolts. Choose UCFL328 when the shaft is larger or the load is higher; the housings are not interchangeable.
Which insert fits UCFL326?
The UC326 insert (130 × 280 × 135 mm). It is sold on its own for replacement.
UCFL326 or UCP326: which should I use?
Both hold the same UC326 insert on a 130 mm shaft. UCFL326 is a oval flange unit (d 130 · L 550 · J 460 mm); UCP326 is a pillow block unit (d 130 · H 180 · J 480 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 UCFL326 come as a complete unit or insert only?
UCFL326 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 UCFL326?
Load ratings for UCFL326 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.