The vibration and noise level of a bearing
expresses component quality and bearing cleanliness.
SNFA bearings are inspected during final manufacturing stage
with special three-frequency band test equipment to get further
confirmation of the quality requirements.
This equipment also permits vibration analysis on frequency
spectra to analyze the behavior of each bearing component.
Typical bearing frequencies are closely correlated to their
design and can be calculated with the following formulas:
BPFO: Frequency of ball passing over the outer ring.
BPFI: Frequency of ball passing over the inner ring.
BSF: Frequency of ball rotation about its axis.
FTF: Frequency of cage rotation.
(where “f” is the frequency, in Hz, of the relative
bearing ring rotation. |
GRW
Product Desc.