UCP206 Bearing Dimensions

UCP206 compared with nearby sizes and housings

UCP206 is a pillow block unit that holds the UC206 insert on a 30 mm shaft: centre height H 42.9 mm, base length L 165 mm and overall height H0 83 mm with M14 bolts.

The same 206 size is also made as UCF206 (square flange unit, d 30 · L 108 · J 83 mm) and UCFL206 (oval flange unit, d 30 · L 148 · J 117 mm). All of them take the same UC206 insert, so a worn insert can be changed without changing the housing type.

UCP207 is the next larger size in the same series on this site: shaft d 35 mm (5 mm more), inner ring width B 42.9 mm (4.8 mm more), centre height H 47.6 mm (4.7 mm more), length L 167 mm (2 mm more), bolt spacing J 127 mm (6 mm more) and overall height H0 93 mm (10 mm more).

UCP205 is the next smaller size in the same series on this site: shaft d 25 mm (5 mm less), inner ring width B 34.1 mm (4 mm less), centre height H 36.5 mm (6.4 mm less), length L 140 mm (25 mm less), bolt spacing J 105 mm (16 mm less) and overall height H0 71 mm (12 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.

UCP206 weight, load ratings and speed

FULI's catalog gives about 1.3 kg for the complete unit, housing and insert together, so 100 pieces of UCP206 weigh about 130 kg before packing.

The catalog lists UCP206 with a dynamic load rating of 19.5 kN and a static load rating of 11.3 kN. Its speed limits depend on the shaft tolerance: 4,700 rpm on a js7 or j7 shaft and 3,400 rpm on an h7 shaft. A closer shaft fit holds the inner ring more evenly, which is why the js7 / j7 figure is higher.

Values from FULI's catalog; confirm for your application.

UCP206 dimensions in inches

The nearest common inch shaft size to the 30 mm bore of UCP206 is 1-3/16 in (30.16 mm), 0.16 mm larger than the bore, so UCP206 will not go on it. An inch shaft needs an inch bore insert. FULI also makes UCP206 with inch bores: UCP206-17 for a 1-1/16 in shaft (26.99 mm), UCP206-18 for a 1-1/8 in shaft (28.58 mm), UCP206-19 for a 1-3/16 in shaft (30.16 mm) and UCP206-20 for a 1-1/4 in shaft (31.75 mm). The outside dimensions stay the same as the metric UCP206.

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

Mounting UCP206 (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. For UCP206 the catalog gives 4,700 and 3,400 rpm for the two cases.

The UC206 insert in UCP206 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 UCP206 down with M14 bolts at 121 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 UCP206

The insert in UCP206 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 UCP206

FULI supplies UCP206 as a complete unit, or the UC206 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 UCP206 or UCP206-17 for the inch bore.

Tools and guides for UCP206

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