Feed Screw mis aligned

dimanche 22 juin 2014

Hi guys,

I've noticed on my new lathe, that when I get to the last section of the feed screw, towards the headstock, that winding the lever wheel on the apron is not as smooth. its affecting my finish, and also when I use the auto feed, the lever is quite hard to dis-engage. I've also noticed some brass shavings in a small section near the headstock on the feed screw, which indicates that its rubbing off and wearing down the half nuts.



I assumed that maybe the feed screw was out, so I ran my dial indicator across it (in the keyway) to see how much.

It looks like it is lower at the headstock end by 20 thou or so.



I'm not too sure how to adjust this, other than drilling larger holes in the tailstock end, where the bearing block is that the feed screw sits inside of and shimming it out. I cannot see how to adjust it from the headstock end.



Anyone able to offer some suggestions n how to best solve this issue.





Middle :



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Headstock end :



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Attached Images






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