Dear Experts

We have a servo driven vertical broaching machine. Ball nut of ballscrew of length about 2m found damaged. Replaced ballscrew with new one but as we had to machine new ballscrew to match with length of the old one, between centre alignment could not be maintained.

With dial gauge, we could find taper upto 200 microns for the entire length of ballscrew & may be due to this slide getting overloaded.

We have ordered new ballscrew of exact spec similar to original one.

Top housing of ballscrew at motor end has 4 angular contact bearing, bottom housing has two angular contact bearings.

Request to advice if temporarily we can remove both dovel pins in top bearing housing and run with mounting screws alone expecting ballscrew alignment would slightly improve to overcome overloading issue

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