Bearing Pinching

HOME > SERVICE > Technical Matters > Pinching

R&D

- Research and development

QA/QC

Basic knowledge

Maintenance

Technical Matters

SERVICE

Pinching

Damage mode	Causes	Solutions
● by pinching, it means accumulation of parts of the tiny burns on the gliding surface leads to surface damage ● linear scars of the circumferential direction of raceways and rolling surface ● axle toroidal pendulum scar on roller end surface ● pinching at the roller end surface	● overload, excessive preload ● poor lubrication ● foreign particles ● inner and outer rings misalignment, shaft deflection ● poor precision of axle and bearing box	● check the bearing load ● appropriate preload ● improve lubricant and lubricating method ● check the shaft and housing precision
● spherical roller bearing inner ring ● squeeze on inner ring flange surface ● caused by roller skidding due to acceleration and deceleration	● inner ring of thrust tapered roller bearing ● squeeze on inner ring flange surface ● due to intrusion of wear powder; overload leads to oil film hot breaking	● roller of double row cylindrical roller bearing ● squeeze on roller end face ● poor lubrication, excessive axial load

Damage mode

Causes

Solutions

● by pinching, it means accumulation

of parts of the tiny burns on the gliding surface leads to surface damage

● linear scars of the circumferential direction of raceways and rolling surface
● axle toroidal
pendulum scar on roller end surface
● pinching at the roller end surface

● overload, excessive preload
● poor lubrication
● foreign particles
● inner and outer rings misalignment, shaft deflection
● poor precision of axle and bearing box

● check the bearing load
● appropriate preload
● improve lubricant and lubricating method
● check the shaft and housing precision

bearing Pinching

● spherical roller bearing inner ring
● squeeze on inner ring flange surface
● caused by roller skidding due to acceleration and deceleration

bearing Pinching

● inner ring of thrust tapered roller bearing
● squeeze on inner ring flange surface
● due to intrusion of wear powder; overload leads to oil film hot breaking

bearing Pinching

● roller of double row cylindrical roller bearing
● squeeze on roller end face
● poor lubrication, excessive axial load