Damage Condition Possible Causes Countermeasures

When debris such as small metallic particles are caught in the rolling contact zone, Denting occurs on the raceway surface or rolling element surface. Denting can occur at the rolling element pitch interval if there is a shock during the mounting (brinell dents).

Debris such as metallic particles are caught in the surface
Excessive load
Shock during transport or mounting
  • Clean the housing
  • Improve the sealing mechanism
  • Filter the lubrication oil
  • Improve the mounting and handling methods

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Denting 1

Denting 1

Part : Inner ring of a double-row tapered roller bearing

Symptom : Frosted raceway surface

Cause : Debris caught in the surface

Denting 2

Denting 2

Part : Outer ring of a double-row tapered roller bearing

Symptom : Indentations on raceway surface

Cause : Debris caught in the surface


Denting 3

Denting 3

Part : Inner ring of a tapered roller bearing

Symptom : Small and large indentations occur over entire raceway surface

Cause : Debris caught in the surface

Denting 4

Denting 4

Part : Tapered rollers of damage "DENTING 3"

Symptom : Small and large indentations occur over the rolling surface

Cause : Debris caught in the surface



Motion & Control