FYH F204 Square 4-Bolt Flange Bearing Housing, 12 to 20 mm (1/2, 5/8 and 3/4 in) Shaft

The FYH F200 is a cast iron square 4-bolt flange bearing housing in the normal duty range. This page covers 13 housings, F204 to F216, for shafts from 12 to 80 mm (inch shaft sizes 1/2 to 3 1/8 in are also covered). Select the housing from the drop-down; each size has its own dimension set in the Model Details.

These 4-bolt flange housings are supplied without an insert bearing. A complete unit such as UCF210 is the F210 housing fitted with a UC210 insert bearing, which is ordered separately (see Related products). This page mixes metric and inch shaft sizes, because the matching inserts come in both bore types: the Shaft Diameter option gives the metric size first and the inch sizes in brackets.

Where this product is used

• Machine frames and walls with a flat mounting face
• Conveyors and drives
• Fans and blowers
• General industrial machinery

Features

• Square four-bolt flange housing (catalogue code F)
• Cast iron housing, 200 series (diameter series code 2, normal duty)
• Insert bearings listed for these housings: UC (set screw) in all sizes; NC (concentric collar) in 9 of 13 sizes; UK (tapered bore, adapter sleeve) in 11 of 13 sizes; SB (set screw, lightweight) in 5 of 13 sizes; SA (eccentric collar, lightweight) in 8 of 13 sizes
• Dimensions for every size in mm with the catalogue inch values, taken from the unit tables

Key specifications

Available sizes

Dimensions in mm. Letters follow the catalogue dimension drawings; the full set of dimensions, with inch values, is in each size's Model Details.

Selecting the right option

Match the housing to the insert bearing and the shaft. The catalogue unit tables pair each housing number with specific insert bearings; for example F210 takes UC210 on a 50 mm shaft.

The page lists metric and inch shaft sizes together. Choose the metric size for a metric shaft; for an inch shaft pick the same housing and order the insert with the matching dash number (for example UC210-30). Every size on this page has an inch bore listed.

F204 covers more than one insert size (F204: 12, 15, 17, 20 mm): the housing is shared across those bores, so confirm the exact insert number when ordering.

The Bolt Size option is the mounting bolt for the housing, as listed in the catalogue unit tables (inch equivalent in the Model Details).

Not sure which insert or housing suits your shaft? Send us the shaft diameter and mounting details and we will confirm the match.

Fitting and use

The housing is supplied without an insert bearing. Order the insert separately and lock it to the shaft in the way its own type requires: a UC insert locks to the shaft with two set screws; an NC insert locks with a concentric collar; a UK insert is a tapered bore insert that mounts on the shaft with an adapter sleeve; an SB insert locks to the shaft with set screws; an SA insert locks with an eccentric collar.

Mount the flange against a flat, rigid face and use the bolt size and bolt hole spacing J shown for the size. Dimension letters follow the catalogue drawings; J is the bolt hole spacing and N the bolt hole diameter.

Related products

Insert bearings that fit these housings, from the catalogue unit tables: UC200 metric set screw insert bearings, UC200 inch set screw insert bearings and UK200 tapered bore insert bearings. Related FYH housings: F300 square 4-bolt flange housings, FX square 4-bolt flange housings, FC200 round flange cartridge housings, FL200 oval 2-bolt flange housings and FB200 3-bolt flange housings.