The 4 Top Reasons Bearings Fail
1. Improper Lubrication
A recent industry study, revealed that up to 80 percent of bearing failures are caused by improper lubrication. This includes insufficient lubrication, use of improper lubricants or excessive temperatures that degrade the lubricant. The signs to look for are discolored rolling elements (such as blue or brown) and rolling-element tracks as well as overheating or excessive wear in the bearing.
When dirt or foreign substances (abrasive grit, dust, steel chips) get into the lubricants or cleaning solutions, they can cause the rolling elements and raceways to dent . This is usually accompanied by vibrations. To avoid this problem, you should filter the lubricant and clean work areas, tools, fixtures and hands to reduce the risk of contamination.
3. Improper Mounting
Most often, bearings should be mounted with a press fit on the rotating ring. Mounting bearings on shafts by applying pressure or blows to the outer race, mounting the bearings into a housing by pressing on the inner ring, having loose shaft fits or loose housing fits, having excessively tight fits, out-of-round housings and a poor finish on the bearing seat can all cause denting, wear, cracked rings and bearing failure. By following proper mounting procedures, this problem can be avoided.
Proper alignment can help you avoid this issue. Misalignment can be caused by bent shafts, out-of-square shaft shoulders, out-of-square spacers, and improper installation. If you notice a wear path that is not parallel to the raceway edges of the non-rotating ring, this is an indication that your problem has been caused by misalignment. Preventive maintenance will help you avoid this issue. Regularly inspect shafts and housings.
IER Services can help you keep your rotating machinery running smoothly. We provide fast, effective, electromechanical machinery repairs.
We offer machine laser alignment, inspections and analysis, advanced tooling and machine installations for AC and DC motors, pump repair, variable frequency drives, and more. We cover Central Ohio and surrounding areas.