This time i want share about common types of bearing damage for electric motor and how to make a corrective action to avoid same problem happen again.Bearing usually can be used for a long period before their reaching the life span.
Bearing damage usually cause by improper bearing selection,no lubrication,rusty,corrosive,no greasing,wrong handling and due to types of application.Below i describe detail about types of bearing damage and how to prevent it from happen again.
What is the root causes for bearing damage?
Description : Surface of the raceway and rolling elements peels away in flakes.Conspicuous hills and valleys form soon afterward
Causes : Excessive load,wrong handling,improper mounting,not precision in shaft or housing,rusty,contamination and no lubricating.
Corrective action : Select suitable type of bearing,Evaluate the clearance,review application method and check type of lubrication and method.
2) Crack / damage cage
Description : Rivets break or become loose resulting in cage damage.
Causes : Excessive load,speed to high,improper mounting,impact from foreign material,excessive vibration and no lubricating.
Corrective action : Select suitable type of bearing,evaluate the clearance,review service condition and check type of lubrication and method.
3) Rust and corrosion
Description : The surface becomes either partially or fully rusted, and occasionally rust even occurs along the rolling element pitch lines.
Causes : Storage condition not suitable,penetration by water,acid etc,handling with bare hand
Corrective action : Review storage condition,improve sealing condition,improve assembly method and handling.
Description : The surfaces wear and dimensional deformation results. Wear is often accompanied by roughness and scratches.
Causes : Foreign material in lubricant,not lubrication,life span,wrong alignment method
Corrective action : Review type of lubricant,check sealing condition and take a step to prevent alignment mistake.
Description : Patches of minute flaking or peeling (size, approx. 10μm).Innumerable hair-line cracks visible though not yet peeling.(This type of damage frequently seen on roller bearings.)
Causes : Foreign matter in lubricant,not lubrication,wrong alignment method and type of lubrication.
Corrective action : Review type of lubricant,check sealing condition,take care for smooth operation and take a step to prevent alignment mistake.