Most vibration analysis software have bearing defect frequency markers build into them, where you select the bearing and the fault frequencies are automatically matched.
I also see that many software have these defect frequencies in Hz and Not Orders. (Eg: SKF NU 216 Bearing have 2.75 Hz as FTF, 22.9 Hz as FTF Also). And it appears to be a constant.
So is bearing defects not related to running speeds? (Eg. NU 216 Bearing can be running at different speeds in different machines). Shouldn't the bearing frequency markers be set according to running speed and in Orders of 1X rather than set frequencies ?
Thank you in advance. Would appreciate your feedback on this.