Motor bearings are susceptible to metal fatigue, also known as spalling, caused by repeated stress. Exceeding the bearing’s designed load capacity significantly accelerates this fatigue process. Continuous overloading weakens the bearing material, ultimately leading to pitting or flaking, and consequently, premature failure.

5 types of failed crankshaft bearings

3-bolt flange mounted bearings are the combinations of 3-bolts flange bearing housings and wider inner ring ball bearings. Standard painting in green (other colors are available for choices).

The self-aligning ability of the ball bearings can compensate for slight static mis-alignemnt of the shaft. The bearing inserts of are locked onto the shaft by means of set screws and eccentric locking collars etc.

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Enginemainbearing failuresymptoms

Proper installation and meticulous alignment are paramount for maximizing motor bearing lifespan and performance. Misalignments induce excessive vibration and uneven loading, accelerating bearing wear. Improper handling or unsuitable tools during installation can directly damage the bearing or compromise its alignment, leading to premature failure.

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Bearing failureAnalysis CHART

Variable frequency drives (VFD) used on AC and DC motors produce induced electrical currents on the motor shaft. This current seeks the path of least resistance to ground, which is typically through the motor bearings. When the current passes through the bearings, electrical arcs take place, leading to fluting, pitting, and bearing damage. The fluted or damaged bearing surface causes noise, vibration, and premature bearing failure.

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Premature bearing failure is a major cause of motor downtime and costly repairs. It’s important to acknowledge that, like any mechanical component, motor bearings will eventually fail. However, understanding the root causes of bearing damage allows you to optimize their lifespan and performance.

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Proper lubrication is critical to extending the lifespan of a motor bearing. It acts as a protective film, minimizing friction and wear by distributing the load more evenly across the motors’ components. This not only reduces stress but also helps prevent overheating and contamination.

Lubricants filled inside the spherical ball bearing inserts can be standard grease, low/hight temperature grease and food grade grease.

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There are several factors that cause damage to motor bearings. Here are some of the most common reasons for premature bearing failure:

Motor bearings are critical components for smooth and reliable operation of your equipment. However, they are susceptible to various factors that can lead to premature failure, resulting in costly repairs and downtime. To address these concerns, implementing a comprehensive prevention strategy is crucial.