200kw motor Bearing Change

200kw motor Bearing Change
How To Replace Electric Motor Bearings
‪@own-logic‬ www.selimit.com
Electric motor bearings regularly experience high levels of stress when driving heavy loads.
This makes them one of the most critical components you need to take care of to keep your motor running smoothly and consistently.
In this article, we'll go over the main reasons why they fail and how to replace them when they do fail so that you can take both preventative and proactive action to maintain your electric motor bearings and operational productivity.
Why Do Bearings Fail?
Electric motor bearings support the motor's spinning shaft during operation, absorbing large radial forces and enabling surfaces to remain in contact while moving at high speed. Despite what they must endure, adequately maintained bearings could last many years before reaching the end of their service life. Several preventable factors accelerate wear and tear and lead to premature bearing failure.
Excessive Torque and Speed
Suppose your motor is operated outside its rated limits for speed or torque or a bearing is fitted that is not properly rated for the motor. In that case, the internal friction in the bearing will overcome the cooling ability of the lubrication. Thus, the bearing will experience overheating, damage, and vibration that ends in failure. To prevent this, make a thorough assessment of your requirements before purchasing a motor or bearing. Pay special attention to radial forces and cyclic or shock loads, as these place exceptionally high stress on the bearing.
Inadequate Maintenance
Inadequate maintenance and protection can cause a bearing to degrade very quickly. If it's not greased-for-life, you must regrease bearings periodically according to the schedule. You must pay special attention to the lubrication type and amount indicated by the manufacturer.
It's also essential to do everything you can to keep contaminants out, including dust, moisture, or anything else which can cause pitting or corrosion of the inner surfaces.
Proper seals and shaft slingers should be fitted to your motor where necessary, and bearings or motors that are not in use should be stored away in a clean, dry, and vibration-free environment.
Incorrect Installation
Incorrect installation or removal of bearings can cause misalignment of new bearings, resulting in focused stress areas that may cause it to fail immediately on start-up or not too far down the road. When removing old bearings, avoid using excessive force as you can damage the shaft or bearing housing and make it difficult to align a new one properly. If you use the wrong tools or techniques during installation, you can damage and deform the case or rolling elements of the new bearing.
We'll cover in-depth the right way to replace bearings later on in the article, but first, let's take a look at what you need to consider when a bearing failure occurs.
Replace or Repair?
One thing you may be wondering when facing a motor replacement is whether it would be more cost-effective to have it repaired by a local shop instead. Especially if you see the signs of damage - such as increased noise, vibration, or excessive heat - but the bearings haven't completely failed, this might be an option.
Typically, it’s not worthwhile to repair bearings on small motors, especially if they're standard type and relatively inexpensive.
If you have medium to larger motors with a particular type of bearing that is costly to replace, you may want to contact your local repair shop about the option of having it professionally repaired.
Ordering a Replacement Bearing
To order a replacement bearing for your electric motor, first find the part number. This is usually visible if the surface has not become worn or corroded.
If you have the parts number, especially if the bearing failed prematurely, double-check that it's the right one for the motor and the intended application.
You can also confirm the correct bearing for your motor using the manufacturer's data packages. In the below video,
Cory shows us where to find the manufacturer data packs.

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