Bearing Frequency Calculator

Frequency Per Minute

Frequency Per Second or Hertz

Time Between Events

FTF (cage frequency)

NAN

NAN

NAN

BSF (ball spin frequency)

NAN

NAN

NAN

BPFO (outer race frequency)

NAN

NAN

NAN

BPFI (inner race frequency)

NAN

NAN

NAN

FTF is the number of times that the cage will rotate around in one revolution of the shaft

BSF is the number of times each rolling element will complete one revolution per revolution of the shaft

BPFO is the number of time a rolling element will pass over a given point on the outer race per one revolution of the shaft

BPFI is the number of times a rolling element will pass over a given poin on the inner race per one revolution of the shaft