Large metal noise
Reason 1: Abnormal load
Reason 2: Improper installation
Reason 3: Inadequate or unsuitable lubricant
Reason 4: Contact with ratating parts
Regular noise
Reason 1: Corrosion or signs of rolling surface by foreign objects
Reason 2: Surface deformation
Reason 3: raceway stripping
Irregular noise
Reason 1: Too large clearance
Reason 2: Access of foreign body
Reason 3: Spherical surface stripping,
Abnormal temperature rising
Reason 1: Surplus lubricant:
Reason 2: inadequate or not suitable lubricant
Reason 3: Abnormal load
Reason 4: Improper Installation
Reason 5: Too large fricion on seal device
Large Vibration
Reason 1: Surface deformation
Reason 2: Stripping
Reason 3: Improper Installation
Reason 4: Access of foreign body
Excessive lubricant leakage, discoloration
Reason: too much lubricant, access of foreign body, friction powder
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