Bearing Failure in Motor-Driven Shaft with 40 kW Load

In summary, the self-aligning bearing on the load side of the shaft started failing within 2 to 3 months of continuous running. The cause is unknown, but it is possible that the axial load is putting too much stress on the bearing. In addition, the imbalance of the load could be playing a role.
  • #1
Koenigindia
1
0
I have a problem of bearing failure. A motor drives a shaft thro a flat belt. This shaft is connected to a load of around 40 kw. The shaft has 1309 self aligning ball bearing as floating bearing at the back end of shaft. On the load side there is a bearing 2209 NUP. The bearing inners are locked by circlips and outer is locked with housing. But within 2 to 3 months of continuous running, either the shaft shifts away from the load after abrading the circlip or the bearing 2209NUP fails. Will somebody be able to throw some light on what is wrong around here.
 
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  • #2
  • #3
My recommendation would be to take or send the bearing and gearbox (or pictures) to a SKF dealer. The have people that do bearing failure analysis on bearings many times a day, and there is likely very little they have not seen.

It could be as simple as your belt being too tight, too much overhang or to the wrong bearing being used, all the way to improper design of gearbox.

SKF sells a failure analysis book for $5 plus other info here:
http://www.skf.com/portal/skf/home/aptitudexchange?contentId=0.237932.237933.237935.237962.238715
 
  • #4
Do you have any kind of vibration monitoring on this set up? It sounds to me like your alignment at the load end may be off putting much more load on the bearing than should be. There is also the issue of imbalance that could be playing a part as well. I can keep guessing, but its a lost cause.

It is impossible to tell you exactly without being able to see the entire set up and what the bearing looks like after failure. Is there any discoloration on the bearing?
 
  • #5
can u attach the sectional view of the bearing arrangement, so that i can analyse the bearing arrangement..
 

FAQ: Bearing Failure in Motor-Driven Shaft with 40 kW Load

What is bearing failure?

Bearing failure refers to the breakdown or malfunction of the bearings in a motor-driven shaft, which are responsible for supporting and allowing the rotation of the shaft.

What are the common causes of bearing failure in a motor-driven shaft with 40 kW load?

Some common causes of bearing failure in a motor-driven shaft with 40 kW load include inadequate lubrication, excessive loading, misalignment, and contamination from dirt or debris.

What are the signs of bearing failure?

The signs of bearing failure may include unusual noises or vibrations coming from the motor, irregular or uneven rotation of the shaft, and increased operating temperatures. Visual inspection may also reveal wear or damage to the bearings themselves.

How can bearing failure be prevented in a motor-driven shaft with 40 kW load?

To prevent bearing failure in a motor-driven shaft with 40 kW load, regular maintenance and lubrication are essential. It is also important to properly align the shaft and ensure that the load is within the recommended limits for the bearings. Keeping the area clean and free of contaminants can also help prevent bearing failure.

What should be done in the event of bearing failure in a motor-driven shaft with 40 kW load?

If bearing failure does occur, the bearings will need to be replaced. It is also important to determine the root cause of the failure and address any underlying issues, such as inadequate lubrication or misalignment, to prevent future failures. In some cases, it may be necessary to replace other components of the motor or shaft as well.

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