WHAT makes the Rolling Element Bearings defect frequencies not always constant (Does not show up at the calculated bearing defect frequencies) ?

💡 We can summerise the answers for the questions mentioned as below;

Question 1 possible answers

  • As the defect frequencies of the bearing are calculated through an equiation based on;

Ball diameter, Pitch Diameter, Number of Balls and Contact Angle,

and Contact Angle parameter will never give integral value.

Question 2 possible answers

  • May be due to manufacuring imperfections
  • Depends on shaft rotating speed that may be changed
  • Depends on actual application of the brg on shaft (Load Direction)
  • Depends on bearing stage of wear (This reason will make the frequencies continuously changing, As the stage of wear changes, the frequencies changes as well)