Find the cause of bearing damage through signs of wear

1. Electric corrosion
When electric current passes through the bearing raceway, it can cause electrical corrosion or sparks. The extent of the damage depends on the amount of energy and the duration, which can lead to galvanic pitting on the rollers and raceways, rapid lubricant degradation and premature bearing failure. To cope with this situation, insulated bearings or insulated bearing sleeves can usually be used on the non-drive end.

2. Lubrication pollution
If the lubricant has insufficient viscosity or contains impurities, the lubricant film between the rolling cage and the raceway will become thinner, resulting in metal-to-metal surface contact. To avoid this, first check that the correct lubricant is used and that the relubrication intervals and dosage are appropriate for the application. If the lubricant contains contaminants, inspect the seals and determine if they need to be replaced or renewed.

3. Vibration wear
If the rotor shaft of the motor is not firmly fixed during transportation, vibration may occur within the bearing clearance, which may wear the bearing and cause damage. Similarly, if the motor is in a static state and is subjected to external vibration for a long time, it will also be damaged. Appropriate methods should be used to secure the bearings during the dynamic transmission process. If the motor has a long resting period, the rotor shaft must be rotated regularly.

4. Improper assembly
Common errors during installation include using a hammer or other similar tool to install the coupling half or pulley on the bearing, misalignment, imbalance, over-tensioning of the belt, etc., resulting in overloading of the bearing.

5. Insufficient load
Damage caused by insufficient bearing preload can manifest itself as adhesive wear on rollers and raceways. To prevent this from happening again, make sure that a large enough external load is applied to the bearings.

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Find the cause of bearing damage through signs of wear