UCFL205 Bearing Dimensions

UCFL205 compared with nearby sizes and housings

UCFL205 is a oval flange unit that holds the UC205 insert on a 25 mm shaft: flange length L 130 mm and flange width H 68 mm with M14 bolts.

The same 205 size is also made as UCP205 (pillow block unit, d 25 · H 36.5 · J 105 mm) and UCF205 (square flange unit, d 25 · J 70 mm (JIS)). All of them take the same UC205 insert, so a worn insert can be changed without changing the housing type.

UCFL206 is the next larger size in the same series on this site: shaft d 30 mm (5 mm more), inner ring width B 38.1 mm (4 mm more), length L 148 mm (18 mm more) and bolt spacing J 117 mm (18 mm more).

UCFL204 is the next smaller size in the same series on this site: shaft d 20 mm (5 mm less), inner ring width B 31 mm (3.1 mm less), length L 113 mm (17 mm less) and bolt spacing J 90 mm (9 mm less), and it takes M10 bolts instead of M14.

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

UCFL205 load ratings

FULI's catalog has no load rating line for UCFL205 itself, so none is given here. The ratings of the UC205 insert are on its own page. Ask us and we send the figures with the quotation.

UCFL205 dimensions in inches

The nearest common inch shaft size to the 25 mm bore of UCFL205 is 1 in (25.40 mm), 0.4 mm larger than the bore, so UCFL205 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 UCFL205 (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 UC205 insert in UCFL205 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 UCFL205 down with M14 bolts at 99 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 UCFL205

The insert in UCFL205 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 UCFL205

FULI supplies UCFL205 as a complete unit, or the UC205 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 UCFL205.

Tools and guides for UCFL205

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