Mood 3 Products

Cracks

Damage ConditionPossible CausesCountermeasures
Cracks in the raceway ring and rolling elements. Continued use under this condition leads to larger Cracks or Fractures.
  • Excessive interference
  • Excessive load, shock load
  • Progression of Flaking
  • Heat generation and Fretting caused by contact between mounting parts and raceway ring
  • Heat generation due to Creep
  • Poor taper angle of tapered shaft
  • Poor cylindricality of shaft
  • Interference with bearing chamfer due to a large shaft corner radius
  • Correct the interference
  • Check the load conditions
  • Improve the mounting method
  • Use an appropriate shaft shape

 

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Troubleshooting, Cylindrical Roller Bearing, Cracks, Outer-Ring

Cracks 1

Part: Outer ring of a double-row cylindrical roller bearing
Symptom: Thermal cracks occur on the outer ring side face
Cause: Abnormal heat generation due to contact sliding

Troubleshooting, Tapered Roller Bearing, Cracks, Rollers

Cracks 2

Part: Roller of a tapered roller thrust bearing
Symptom: Thermal cracks occur at large end face of roller
Cause: Heat generation due to sliding with the inner ring rib under poor lubrication

Troubleshooting, Cylindrical Roller Bearing, Cracks, Outer-Ring

Cracks 3

Part: Outer ring of a double-row cylindrical roller bearing
Symptoms: Cracks propagated outward in the axial and circumferential directions from the Flaking origin on the raceway surface
Cause: Flaking from a flaw due to shock

Troubleshooting, Cylindrical Roller Bearing, Cracks, Outer-Ring

Cracks 4

Part: Outer ring of a double-row cylindrical roller bearing used for outer ring rolling (Outer ring rotation)
Symptom: Cracks on outside surface
Cause: Flat Wear and heat generation due to non-rotation of the outer ring

Troubleshooting, Cylindrical Roller Bearing, Cracks, Outer-Ring

Cracks 5

Part: Raceway surface of outer ring of damage “Cracks 4”
Symptom: Outside surface crack propagating to the raceway

Troubleshooting, Spherical Roller Bearing, Cracks, Inner-Ring

Cracks 6

Part: Inner ring of a spherical roller bearing
Symptom: Axial Cracks on raceway surface
Cause: Large fitting stress due to temperature difference between shaft and inner ring

Troubleshooting, Spherical Roller Bearing, Cracks, Cross Section

Cracks 7

Part: Cross section of cracked inner ring of damage “Cracks 6”
Symptom: Origin is directly beneath the raceway surface

Troubleshooting, Spherical Roller Bearing, Cracks, Rollers

Cracks 8

Part: Roller of a spherical roller bearing
Symptom: Axial Cracks on rolling surface

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