motor/rotor issues

Check the motor mounts. It also depend in the use. At my facility they use it over any other centrifuge and we had to replace the motor every year.

We have had the same problem. One of the motors lasted 4 months and died. Beckman would not cover a replacement stating that there is a 90 day warranty. Talked to Service manager after this motor began giving us problems and he tried to blame our incoming power as the problem even though we have 3 other centrifuges running on the same ckt with no problems. He said he MIGHT be able to get us 20% off of the next motor! I am especially disgusted with this issue and the way it was handled because I used to be a field service engineer for Coulter before Beckman bought them out and this would have never happened then. Customer service... May you rest in peace.

The X-22 motor has gone through 3 revisions in order to eleviate these issues. Early production model motors proved to have too small of a bottom bearing. Sometime in 2007 the bearing size was increased in an attempt to rectify this issue. In 2009 the bottom bearing design was modified once again to include more press and a wave washer was added at the top bearing. This last revision has shown to be the most effective. The best advice I can give to eleviate premature motor failures on this model or any other induction drive is to balance the load as much as possible. These motors operate most of their lives with slightly unbalanced loads. This causes vibration which is transmitted through the bearings and bearing seats. Once the bearing begins to wear it is probable that the bearing will begin to turn in the bearing seat and the motor is destined for failure. I would venture to say that a perfectly balanced load over the life of the instrument would increase motor longevity 10 fold.

I have heard this over and over again. Motor failure is a common problem with these centrifuges. That is how the company makes money. I am not here to blast them, but just to say that all they care about is charging for replacements.