Automatic Condition Monitoring of Industrial Rolling-Element Bearings Using Motor’s Vibration and Current Analysis

Table 2

Deviations (percentage) of measured and calculated CFs at 20 Hz and 50 Hz motor inputs and free load condition.

Scenarios	50 Hz input	20 Hz input
Cage
C	19.18	7.67
M	19.5	8.0
D (%)	1.67	4.3
Ball
C	101.68	40.67
M	103.5	41.5
D (%)	1.79	2.04
Inner
C	246.51	98.60
M	244.5	97.5
D (%)	−0.82	−1.12
Outer
C	153.49	61.39
M	155.5	62.0
D (%)	1.32	0.99