UCT326 Bearing Dimensions

UCT326 compared with nearby sizes and housings

UCT326 is a take-up unit that holds the UC326 insert on a 130 mm shaft: dimension H 385 mm, dimension L 465 mm, dimension L1 285 mm and dimension N2 150 mm.

The same 326 size is also made as UCP326 (pillow block unit, d 130 · H 180 · J 480 mm) and UCFL326 (oval flange unit, d 130 · L 550 · J 460 mm). All of them take the same UC326 insert, so a worn insert can be changed without changing the housing type.

UCT328 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), dimension H 415 mm (30 mm more) and dimension L 515 mm (50 mm more).

UCT321 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), dimension H 290 mm (95 mm less) and dimension L 345 mm (120 mm less).

Dimensions in mm from the model pages; weight from FULI's catalog, — = not listed on this site.

UCT326 load ratings

FULI's catalog has no load rating line for UCT326 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.

UCT326 dimensions in inches

The nearest common inch shaft size to the 130 mm bore of UCT326 is 5-1/8 in (130.18 mm), 0.18 mm larger than the bore, so UCT326 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.

Converted at 1 in = 25.4 mm and rounded to four decimals. The bearing itself is made to the millimetre sizes.

Mounting UCT326 (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 UCT326 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 UCT326 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 UCT326

The insert in UCT326 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 UCT326

FULI supplies UCT326 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 UCT326.

Tools and guides for UCT326

• Insert bearing sizes: UC, SB and SA
• Pillow block bearing sizes
• Flange bearing sizes
• Take-up bearing units
• Pillow block bearing cross reference
• Bearing lubrication basics
• All bearing products and model pages