The abbreviation GPR given in our numbering
system stand for 100% noise-tested ball bearings. We test
the amplitude of the vibrations generated by the ball bearings
at the set speeds and frequencies.
The realization of these tests is necessary to ensure uniformity
of the production run or to guarantee compliance with customer
requirements. The basis for attaining this goal is constant
monitoring of the parts for roundness and surface finish.
The testing method should be selected according to the nature
of the later use.
