UCT218 Bearing Dimensions
UCT218 take up bearing unit: 90 mm bore, T218 housing + UC218 insert. Frame dimensions H 215 / L 275 mm, designation and size-equivalent codes.
UCT218 specifications
| Shaft diameter d | 90 mm |
|---|---|
| Dimension H | 215 mm |
| Dimension L | 275 mm |
| Dimension L1 | 170 mm |
| Dimension N2 | 80 mm |
| Insert width B | 96 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 UCT218 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) |
| 2 | 200 series (light duty) |
| 18 | Bore code 18 → 90 mm bore. ISO bore code (00–03 = 10/12/15/17 mm; 04 and above = code × 5 mm). |
UCT218 interchange
UCT218 is a housed unit: a UC218 insert bearing in a T218 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.
UCT218 compared with nearby sizes and housings
UCT218 is a take-up unit that holds the UC218 insert on a 90 mm shaft: dimension H 215 mm, dimension L 275 mm, dimension L1 170 mm and dimension N2 80 mm.
UCT217 is the next smaller size in the same series on this site: shaft d 85 mm (5 mm less), inner ring width B 85.7 mm (10.3 mm less), dimension H 198 mm (17 mm less) and dimension L 260 mm (15 mm less).
| Model | Type | Main dimensions | Weight (kg) |
|---|---|---|---|
| UCT218 | take-up unit (this page) | d 90 · H 215 · L 275 mm | — |
| UCT217 | take-up unit | d 85 · H 198 · L 260 mm | — |
Dimensions in mm from the model pages; weight from FULI's catalog, — = not listed on this site.
UCT218 load ratings
FULI's catalog has no load rating line for UCT218 itself, so none is given here. Ask us and we send the figures with the quotation.
UCT218 dimensions in inches
The nearest common inch shaft size to the 90 mm bore of UCT218 is 3-9/16 in (90.49 mm), 0.49 mm larger than the bore, so UCT218 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 | 90 mm | 3.5433 in |
| Dimension H | 215 mm | 8.4646 in |
| Dimension L | 275 mm | 10.8268 in |
| Dimension L1 | 170 mm | 6.6929 in |
| Dimension N2 | 80 mm | 3.1496 in |
| Insert width B | 96 mm | 3.7795 in |
Converted at 1 in = 25.4 mm and rounded to four decimals. The bearing itself is made to the millimetre sizes.
Mounting UCT218 (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 UC218 insert in UCT218 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 UCT218 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 UCT218
The insert in UCT218 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 UCT218
FULI supplies UCT218 as a complete unit, or the UC218 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 UCT218.
Tools and guides for UCT218
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 UCT218 fit?
A 90 mm shaft (3.5433 in).
Which insert fits UCT218?
The UC218 insert. It is sold on its own for replacement.
Does UCT218 come as a complete unit or insert only?
UCT218 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 UCT218?
Load ratings for UCT218 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.