HCH Bearing

Product&Technical

Bearing specification

• 60 Series

• 62 Series

• 63 Series

• 68 Series

• 69 Series

• Inch 16 Series

• Inch R Series

• Inch Tapered

Roller Bearings

• Metric Tapered

Roller Bearing

• Special Ball Bearing

Technical Information

• Bearing Numbering

System

• Bearing Construction &

Components

• Bearing Material

• Accuracy

• Internal Clearance

• Vibration and Noise

• Lubricant

• Torque

Care & Maintenance

• Bearing Damage

and Corrective

measure

• Bearing Handling

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Bearing Damage and Corrective measure

While it is of course impossible to directly observe bearings in operation. One can get a good idea of how they are opening by monitoring noise,vibration,temperature and lubricant condition. Types of damage typically encountered are presented in table.

	Description	Causes	Correction
Seizure	The bearing heats up and becomes discolored Eventually the bearing will seize up.	• Insufficient clearance (including clearances made smaller by local deformation). • Insufficient lubrication or improper lubricant. • Excessive loads (excessive pressure).	• Check for proper clearance. (Increase clearances.) • Review lubricant type and quantity. • Review application conditions. Take steps to prevent misalignment. • Revaluate the design of the area around the bearing (Including fitting of the bearing) • Improve assembly procedure.
Retainer damage	Rivets break or become loose resulting in retainer damage.	• Excessive moment loading. • High speed or excessive speed fluctuations. • Inadequate lubrication. • Impact with foreign objects. • Excessive vibration. • Improper mounting. (Mounted misaligned) • Abnormal temperature rise. (Plastic retainer)	• Review of application conditions. • Revaluation of lubrication conditions • Review of retainer type selection. • Take more care in handing. • Investigate shift and housing rigidity.
Meandering wear patterns	Abrasion or an irregular. meandering wear pattern left by rolling elements along raceway surfaces.	• Shaft or housing of insufficient accuracy • improper installation insufficient shaft or housing rigidity • Shaft whirling caused by excessive internal bearing clearances.	• Reinspect bearing's internal clearances. • Review accuracy of shall and housing finish. • Review rigidity of shall and housing
Rust and corrosion	The surface become s either partially or fully rusted, and occasionally rust even occurs along the rolling element pitch lines.	• Poor storage conditions • Poor packaging. • Insufficient rust inhibitor • Penetration by water, acid, etc • Handing with bare hands.	• Take measures to prevent rusting while in storage • Improve sealing performance. • Periodically inspect the lubrication oil • Take care when handing the bearing.
Surface matting	Luster of raceway surfaces is gone; surface is matted, rough, and /or evenly dimpled. Surface covered with minute dents.	• Infiltration of bearing by foreign matter • Insufficient lubrication.	• Revaluation of lubricant type and lubrication method • Review sealing mechanisms. • Examine lubrication oil purity (fitter may be excessively dirty. etc)