Ball bearing units
Ball bearing units consist of a precision wide inner ring bearing assembled into a housing made of cast iron or pressed steel. Units are prelubricated and are designed to slip fit on to the shaft. Locking method is either set screw locking, eccentric self-locking or concentric. On cast iron and pressed steel units, the outside diameter of the bearing and the inside diameter of the housing are sphered, allowing the bearing to swivel within the housing to accommodate initial alignment.
There are numerous bearing and housing combinations to accommodate a diversity of mounting surfaces, load requirements, shaft sizes and dimensional requirements.
- Y-bearing plummer block units (fig. 3)
Y-bearing flanged units (fig. 4)
- with cast iron housings – table 6, table 7 and table 8
- with composite housings – table 9 and table 10
- with pressed steel housings (housings to be ordered separately from the bearings) – table 11 and table 12
- with housings made of composite for SKF Food Line – table 13, table 14 and table 15
- with cast stainless steel housings – table 16 and table 17
- Y-bearing take-up units (fig. 5, fig. 6)
Other units can be composed by ordering the parts separately.
- agricultural machinery
- construction equipment
- conveyor systems
- textile machines and fans
- machines for food and beverage processing and packaging
If ball bearing units are to be used in an application where health, safety, or the environment is at risk, the SKF application engineering service has to be contacted during the design phase.
This is also true for applications with relatively high speeds and where machine downtime can cause significant problems.