FYH UC204-12L2 Insert Bearing, 3/4 in Bore, Double Seal (L2), Set Screw, 47 mm O.D.

This page covers 4 FYH UC200 series insert bearings with set screws and a double seal (L2) or triple-lip seal (L3): UC204-12L2, UC206-20L3, UC207-23L3 and UC211-32L3. Choose the size from the drop-down; the part number shows the seal type, and each variant has its own dimensions and ratings in the Model Details (imperial bores).

An insert bearing is the replaceable bearing inside a plummer block (pillow block), flange or take-up unit. UC type inserts have a wide inner ring and a spherical O.D., so they seat in a housing with a matching spherical bore.

Where this product is used

• Replacement insert for a plummer block or pillow block unit
• Replacement insert for flange and take-up housings with a matching spherical bore
• Conveyor rollers, drive shafts and idler stations
• Fans, blowers and pumps
• Agricultural, construction and general industrial machinery

Features

• Wide inner ring with set screws (FYH Bullet Point type) spaced 120 degrees apart to lock the insert on the shaft
• Spherical O.D. with a grease groove and grease holes, so the insert can be re-lubricated when it is in a housing
• Triple-lip seal type (L3) on the models with L3 in the part number; the models with L2 in the part number are the double seal type
• Supplied pre-lubricated with FYH grease
• Basic dynamic load rating Cr 12.8 to 43.4 kN and static rating C0r 6.65 to 29.4 kN (see the Model Details for each size)

Key specifications

Available sizes

A dash means the catalogue gives no figure for that exact model number, so none is shown.

Selecting the right option

Every size on this page has an imperial (inch) bore. The drop-down shows the shaft size in inches; the Model Details give the bore in mm with the inch size in brackets. Metric shafts need the metric version of the insert.

Set screw (grub screw) inserts lock to the shaft with set screws spaced 120 degrees apart, so they suit a plain shaft of the matching bore size.

Seal types on this page: L3 means the triple-lip seal type; L2 means the double seal type (the catalogue table marks UC201 to UC205 as double seal type). The part number tells you which seal the variant has. The catalogue lists lower allowable rotating speeds for the L3 type than for the standard seal, and gives no separate speed for the L2 type.

Fitting and use

Check the load and speed against the catalogue figures in the Model Details before ordering, and apply a suitable safety factor. The allowable rotating speed in the catalogue is a standard value: it falls to 80% for units fitted with covers, and a loose fit between shaft and inner ring reduces it further.

Tighten the set screws once the insert is in position on the shaft.

Match the insert to a housing with the same size number: the spherical O.D. seats in a matching spherical housing bore.

If you are unsure which insert suits a shaft and housing, send AIMS the part numbers or sizes and we will confirm the fit.

Related products

The L2 and L3 inserts share the dimension row of the standard UC insert of the same size, and the catalogue unit tables pair that UC insert with these FYH housings (matched by size number): P200 series pillow block (plummer block) housings (4 of 4 sizes), PA200 series tapped base pillow block housings (3 of 4 sizes), F200 series four bolt flange housings (4 of 4 sizes), FL200 series two bolt flange housings (4 of 4 sizes), FC200 series round flange cartridge housings (4 of 4 sizes), FB200 series three bolt flange housings (3 of 4 sizes) and T200 series take-up housings (4 of 4 sizes). Related FYH insert bearing pages: UC200 L2/L3 seal insert bearings, 25 to 55 mm bore (metric), UC200 insert bearings, 12 to 90 mm bore (metric) and UC200 insert bearings, 1/2 to 3 1/2 in bore (imperial). Single-model pages in this range: UC204L2, UC205-16L2, UC207-20L3, UC207L3, UC208-24L3, UC210-30L3 and UC210L3.