FAG housings and their associated bearings form bearing units that prove reliable in machines, systems, and equipment.
Bearing housings are predominantly made of gray cast iron. Steel cast and spheroidal graphite cast housings are available upon request. Since the bearings are usually lubricated with grease and the initial fill lasts a long time, most housings do not have relubrication holes. However, gating points or markings are provided so that lubrication holes can be added if necessary. When relubricating, ensure that excess grease can escape. All non-machined external surfaces of housings and housing parts are coated with a universal primer (RAL 7031, blue-gray). The coating can be overpainted with all synthetic resin, polyurethane, acrylic, epoxy, chlorinated rubber, nitrocellulose, and acid-curing hammer finishes. The corrosion protection on machined internal and external surfaces can be easily removed.
The bearing seating areas in the housing are generally machined to allow the bearings to be adjustable, i.e., to act as floating bearings. Fixed bearings are achieved by inserting locking rings where these are listed in the tables. Locking rings must be ordered separately. Housings without locking rings are supplied in floating or fixed bearing configurations.
Depending on the application conditions, contacting seals, non-contacting seals, and combinations of these are available for sealing the bearing housings.
Split and non-split pillow block housings are generally designed for use with spherical roller bearings, barrel bearings, and spherical roller bearings. The removable top cover of split pillow block housings, which is centered on the base by dowel pins, facilitates installation and maintenance. The top covers must not be interchanged. Tolerance specifications for bearing seats in split housings apply only to the delivery state, i.e., before loosening the connection bolts between the top and base parts.