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  Contact: Chuck Peterson - (620) 727-1347 [Email]  or Del Metcalf - (620) 728-1295 [Email]
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BEARING MAINTENANCE PROGRAM

Key Benefits:

bullet Proper lubrication of motor bearings
bullet Early prediction of potential problems in bearings
bullet Trending and data gathering to back up these predictions.
bullet All data and records are downloaded to your computers so you have it at your fingertips
bullet Never over grease another motor.
bullet Repairs are now scheduled and not completed in a very expensive down time situation.

Greasing bearings with Ultrasound Detection is very fast becoming the way to go. We can actually tell by Ultrasound Detection when bearings need greased and - just as importantly - when they have enough grease. We listen to the bearing and when it sounds smooth like air escaping then it is properly lubricated. When it sounds like popcorn popping or gravel in a bucket it needs greased. We then have the maintenance man grease the bearing ½ stroke at a time while we listen to the bearing with the Ultraprobe 10000. We can hear the grease enter the bearing, and the sound quickly goes to the smooth sound of air escaping. At that point we stop the greasing. You can hear the sound here.

The biggest problem we find in bearings is the fact that they are over-greased. The maintenance man doing the greasing usually does not know how much grease to put into the bearing. In the past, we just pumped a few strokes into the bearing and assumed that would be fine. Many times, too much grease was used. The following pictures will show the results of that style of greasing.

Once we can hear that we have enough grease, adding more would only cause harm. After properly greasing a bearing, we go and check other bearings and return to this on in 10-15 minutes. If the smooth sound remains, everything is working properly. If the noise has returned, the bearing is marked for attention and/or replacement. Usually the bearing will be watched, and when the noise starts to get loud enough that you can hear it with your own ears and the temperature starts to rise then it is scheduled for replacement.

In the case of this motor there was no attention paid to how much grease was being put into the bearing. The old days of grease-until-it-oozes-out are long gone but people do actually still grease that way. This motor had sealed bearings in it and there was no grease getting into the bearing, so it never cooled down and never got any quieter. To remedy this, they just continued to grease it. After a point there was so much grease in it that the motor started to heat up. What happened then? It was still heating up, so THEY GREASED IT SOME MORE.

With the bearing program that is offered from Peterson Predictive Maintenance this could never happen. We would be able to tell when the bearing had enough grease or even if the bearings were shielded bearings. If there is never a decrease in noise, from the grease getting into the bearing, or in fact an increase in noise then the bearings are most likely shielded and greasing will do no good.

By running all the critical machines bearings on a quarterly basis that allows us to insure proper lubrication and it will also allow us to trend the bearings giving us data to predict a potential failure in the future. With the Ultrasound Bearing Program we can actually hear the chrome flaking off of the balls in the bearings before vibration will pick it up. We have documentation where we have predicted problems in bearings 3 to 5 weeks before vibration has picked it up.

 
 
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