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Seizure

Services - Troubleshooting - Damage by Type - Seizure: When sudden overheating occurs during rotation, the bearing becomes discolored. Then, the raceway rings, rolling elements and cage will soften, melt and deform as damage accumulates.

Rust and Corrosion

Services - Troubleshooting - Damage by Type: Bearing rust and corrosion are pits on the surface of rings and rolling elements and may occur at the rolling element pitch on the rings or over the entire bearing surfaces.

Creep

Services - Troubleshooting - Damage by Type: Creep is the phenomenon in bearings where relative slippage occurs between fitting surfaces and thereby creates a clearance between them surface. Creep causes a shiny appearance with Scoring or Wear.

Discoloration

Services - Troubleshooting - Damage by Type - Discoloration of cages, rolling elements and raceway rings occurs due to their reacting with lubricant at high temperature.

Mounting Flaws

Services - Troubleshooting - Damage by Type - Mounting Flaws: Straight line scratches on surface of raceways or rolling elements caused during mounting or dismounting of bearing.

Electrical Corrosion

Services Troubleshooting - Damage by Type - Electrical Corrosion: When electric current passes through a bearing, arcing and burning occur through the thin oil film at points of contact between the raceway and rolling elements.

Typical RB Running Traces

Typical DGBB Running Traces

Services - Troubleshooting - Damage by Load / Contact Patterns: Typical Running Traces of Deep Groove Ball Bearings, showing the most common running trace generated when the inner ring rotates under a radial load only.

Online Services

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Indentations

Troubleshooting - Linear Guides - Indentations: Dents on the raceway at each ball location similar to the deformation caused by a Brinell Hardness Test or on the raceway caused by contamination or metallic particles.

Electrolytic Corrosion

Services - Troubleshooting - Linear Guides - Electrolytic corrosion: Pits like spot corrosion on balls and raceways.

Wear

Services - Troubleshooting - Linear Guides - Wear: Severe friction resulted in serious wear on the rolling contact surface of raceway and/or balls.

Flaking

Troubleshooting - Linear Guides - Flaking: The rolling contact surface of the rail, the ball slide and the ball flakes away like scales.

Fretting

Services - Troubleshooting - Linear Guides - Fretting: Fretting is a type of wear that is caused by relative repeated rubbing with minute amplitude between contacting surfaces.

Corrosion

Services - Troubleshooting - Linear Guides - Corrosion: Corrosion on raceways and balls.

Damaged Ball Recirculation Parts

Services - Troubleshooting - Linear Guides - Damaged ball recirculation parts: Balls become free from the ball slide due to broken plastic ball re-circulation parts.

Indentations

Services - Troubleshooting - Ball Screws - Indentations on the raceway at each ball location caused by a Brinell Hardness Tester or by contamination or by metal particles.

Flaking

Services - Troubleshooting - Ball Screws - Flaking: The raceways of the screw shaft and ball nut and/or the surface of the ball peel off like scales because of fatigue.

Breakage of Shaft End

Services - Troubleshooting - Ball Screws - Breakage of shaft end: Shaft end (mainly bearing journal) broke completely.

Wear

Services - Troubleshooting - Ball Screws - Wear: Severe friction resulted in serious wear on the rolling contact surface of raceways.