UCT328 Bearing Dimensions
UCT328 take up bearing unit: 140 mm bore, T328 housing + UC328 insert. Frame dimensions H 415 / L 515 mm, designation and size-equivalent codes.
UCT328 specifications
| Shaft diameter d | 140 mm |
|---|---|
| Dimension H | 415 mm |
| Dimension L | 515 mm |
| Dimension L1 | 315 mm |
| Dimension N2 | 160 mm |
| Insert width B | 145 mm |
| 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. Letters follow the dimension drawing in FULI's catalog; ask us for the drawing.
How to read the UCT328 designation
| Segment | Meaning |
|---|---|
| UC | Insert bearing with set-screw locking and spherical outside diameter |
| T | Take-up housing (slides in a frame to tension a belt or chain) |
| 3 | 300 series (medium duty) |
| 28 | Bore code 28 → 140 mm bore. ISO bore code (00–03 = 10/12/15/17 mm; 04 and above = code × 5 mm). |
UCT328 interchange
UCT328 is a housed unit: a UC328 insert bearing in a T328 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 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.
UCT328 compared with nearby sizes and housings
UCT328 is a take-up unit that holds the UC328 insert on a 140 mm shaft: dimension H 415 mm, dimension L 515 mm, dimension L1 315 mm and dimension N2 160 mm.
The same 328 size is also made as UCP328 (pillow block unit, d 140 · H 200 · J 500 mm) and UCFL328 (oval flange unit, d 140 · L 600 · J 500 mm). All of them take the same UC328 insert, so a worn insert can be changed without changing the housing type.
UCT326 is the next smaller size in the same series on this site: shaft d 130 mm (10 mm less), inner ring width B 135 mm (10 mm less), dimension H 385 mm (30 mm less) and dimension L 465 mm (50 mm less).
| Model | Type | Main dimensions | Weight (kg) |
|---|---|---|---|
| UCT328 | take-up unit (this page) | d 140 · H 415 · L 515 mm | — |
| UCT326 | take-up unit | d 130 · H 385 · L 465 mm | — |
| UC328 | insert bearing | 140 × 300 × 145 mm (d × D × B) | — |
| UCP328 | pillow block unit | d 140 · H 200 · J 500 mm | — |
| UCFL328 | oval flange unit | d 140 · L 600 · J 500 mm | — |
Dimensions in mm from the model pages; weight from FULI's catalog, — = not listed on this site.
UCT328 load ratings
FULI's catalog has no load rating line for UCT328 itself, so none is given here. The ratings of the UC328 insert are on its own page. Ask us and we send the figures with the quotation.
UCT328 dimensions in inches
The nearest common inch shaft size to the 140 mm bore of UCT328 is 5-1/2 in (139.70 mm), 0.3 mm smaller than the bore, so UCT328 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 | 140 mm | 5.5118 in |
| Dimension H | 415 mm | 16.3386 in |
| Dimension L | 515 mm | 20.2756 in |
| Dimension L1 | 315 mm | 12.4016 in |
| Dimension N2 | 160 mm | 6.2992 in |
| Insert width B | 145 mm | 5.7087 in |
Converted at 1 in = 25.4 mm and rounded to four decimals. The bearing itself is made to the millimetre sizes.
Mounting UCT328 (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 UC328 insert in UCT328 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 housing of UCT328 slides in the guides of the frame. Set the belt or chain tension with the adjusting screw first, then lock the insert to the shaft.
Grease for UCT328
The insert in UCT328 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 UCT328
FULI supplies UCT328 as a complete unit, or the UC328 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 UCT328.
Tools and guides for UCT328
Typical applications
- Belt conveyor take-up (tail) pulleys
- Screw conveyors and bucket elevators
- Chain and belt tensioning on agricultural machinery
FAQ
What shaft size does UCT328 fit?
A 140 mm shaft (5.5118 in).
Which insert fits UCT328?
The UC328 insert (140 × 300 × 145 mm). It is sold on its own for replacement.
UCT328 or UCP328: which should I use?
Both hold the same UC328 insert on a 140 mm shaft. UCT328 is a take-up unit (d 140 · H 415 · L 515 mm); UCP328 is a pillow block unit (d 140 · H 200 · J 500 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 UCT328 come as a complete unit or insert only?
UCT328 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 UCT328?
Load ratings for UCT328 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.