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  • Bearing Failures and Handling Measures
  • Preventive Measures for Common Bearing Problems

Preventive Measures for Common Bearing Problems

Post By: Ayu Amira September 26, 2022
0 Comment
Sep 26, 2022

How to prevent bearing contamination


Symptoms:

  • ✧ High vibration and wear (caused by denting of the raceways and balls).

Prevention:

  • ✧ Always keep your hands, work areas, tools, and fixtures clean.
  • ✧ Keep bearings in their original packing until they are ready to be installed, and keep grinding operations away from bearing assembly locations.
  • ✧ Seals are essential because faulty or damaged seals cannot protect bearings from foreign contaminants.

How to prevent misalignment


Symptoms:

  • ✧ An unusual rise in bearing or housing temperature.
  • ✧ Heavy wear in the cage ball-pockets.

Most prevalent causes:

  • ✧ Bent shafts.
  • ✧ Dirt or burrs on the shoulders of housing or shaft.
  • ✧ Shaft threads are not square with shaft seats.
  • ✧ Locking nuts with faces that are not square to the thread axis.

Appropriate corrective actions:

  • ✧ Perform inspections of shafts and housings for runout of shoulders and bearing seats.
  • ✧ Use of ground threads solely on hardened shafts and single point-turned or ground threads on non-hardened shafts.
  • ✧ Using lock nuts of the highest precision grade.

How to fix overloaded bearings


Appropriate corrective actions:

  • ✧ Reduce the weight that the bearing can handle or redesign it with another bearing with greater load capacity.
  • ✧ Add bearings or alter bearing size to relieve pressure on each individual bearing (if high axial or radial loads are the cause of overloading).
  • ✧ An angular contact bearing can be optimised for a particular type of load by adjusting the contact angle.

How to cure overheating


Symptoms:

  • ✧ Discolouration (from gold to blue) of the balls, rings, and cages.

Causes:

  • ✧ Insufficient lubrication or cooling.
  • ✧ Inadequate heat paths.
  • ✧ Heavy electrical heat load.

Cure:

  • ✧ Additional lubricant cooling.
  • ✧ Sufficient heat path.
  • ✧ Thermal or overload controls.

How to solve normal fatigue failure


Symptoms:

  • ✧ Fracture on the running surfaces and the subsequent removal of tiny, discrete particles of material.

Solver:

  • ✧ Replace the bearing or re-design it to use a bearing with a longer calculated fatigue life.

How to extend the life of lubricants


Symptoms:

  • ✧ Discolouration (blue/brown) of balls and ball tracks.

Lubricant life extension:

  • ✧ Correct the improper fit.
  • ✧ Control preload better.
  • ✧ Cool the shafts and housings down.

How to prevent corrosion


Symptoms:

  • ✧ Discolouration (red/brown) of ball areas, bands of balls, raceways, and cages.

Prevention:

  • ✧ Diverting corrosive fluids away from bearing areas and, whenever possible, using integrally sealed bearings.
  • ✧ The use of external seals in addition to internal seals should be taken into consideration if the environment is hazardous.
  • ✧ It is also recommended to use stainless steel bearings.
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