Ball cages are manufactured from a heat treated aluminum alloy 
which provides tough, wear resistant qualities. The ball bearings are 
vacuum degassed quality, fatigue resistant steel and are inspected 
to ensure roundness, smoothness and dimensional conformance. 
The ball bearings are arranged in the cage in a spiral pattern to 
minimize tracking or grooving and assure uniform wear. Ball cages 
are mounted to drilled and tapped guide posts by a special washer 
assembly which permits the cage to rotate freely around the guide 
post when not under pre-load.