Abnormal Temperature Rise of Bearings: 5 Major Causes and Emergency Handling Solutions

5 Major Causes

Inadequate Lubrication: Insufficient or degraded lubricating oil/grease fails to form an effective oil film, leading to increased friction and heat.

Overloading: Exceeding the bearing's rated load (radial/axial) causes excessive contact stress between rolling elements and raceways.

Misalignment: Poor installation results in shaft or housing misalignment, creating uneven load distribution and abnormal friction.

Contamination: Foreign particles (dust, metal debris) entering the bearing damage the raceway and rolling elements, generating heat.

Aging/Damage: Wear, fatigue, or cracks in bearing components (e.g., cages, rollers) reduce performance and cause heat buildup.

Emergency Handling Solutions

Immediate Shutdown: Stop the equipment to prevent further damage if temperature rises sharply or exceeds the safe range.

Check Lubrication: Inspect lubricant level, quality, and replace if contaminated/degraded; replenish appropriately.

Inspect Alignment: Check shaft and housing alignment using tools like dial indicators and realign if necessary.

Remove Contamination: Clean the bearing housing and replace seals if contamination is found; reinstall with clean lubricant.

Replace Damaged Bearings: If aging/damage is confirmed, replace the bearing with a matching model and ensure proper installation.