flmbeaverdam1973
Plastic
- Joined
- Aug 22, 2017
Hello,
I am working to get my 10x60 3hp Hydrashift lathe in shape. I had some pretty horrendous (150 thousands) backlash in the crossfeed and have been trying to get down to a minimum. In the process I discovered that the crossfeed taper pin was sheared off by a prior &%&*bag operator in what way I have no idea since there was no evidence of trauma to the handwheel. The handwheel was still turning the screw until I started to tighten nut at dial per the manual to take out backlash. I had to drill out pin in handle and drift out remainder in screw. I then put in a broken drill I happened to have that closely approximated the size to see if I could take out the backlash by tightening the nut at the dial. Lo and behold I got down to 12 thousands backlash. I also was tightening the crossfeed nut setscrew and top screw to accomplish this. When I got the backlash down to .0012 I decided to run the auto feed at low speed to check the function and along the way it seems I locked up and the crossfeed nut seems to have stretched above the cut and will not run the screw now. There was already a crack in the nut and wear in the threads, but I think I exacerbated it.
Sorry for the lengthy intro, but my question is does someone have specs on this part. I believe it is bronze as most are, but it seems to have an 8 pitch acme thread, which is a real bas##rd to find. I am not even considering calling Cincinnati to source part, and now I need to make one. I do not have a mill yet, so I am trying to find some specs for this part. Any and all help is appreciated.
Thank you
I am working to get my 10x60 3hp Hydrashift lathe in shape. I had some pretty horrendous (150 thousands) backlash in the crossfeed and have been trying to get down to a minimum. In the process I discovered that the crossfeed taper pin was sheared off by a prior &%&*bag operator in what way I have no idea since there was no evidence of trauma to the handwheel. The handwheel was still turning the screw until I started to tighten nut at dial per the manual to take out backlash. I had to drill out pin in handle and drift out remainder in screw. I then put in a broken drill I happened to have that closely approximated the size to see if I could take out the backlash by tightening the nut at the dial. Lo and behold I got down to 12 thousands backlash. I also was tightening the crossfeed nut setscrew and top screw to accomplish this. When I got the backlash down to .0012 I decided to run the auto feed at low speed to check the function and along the way it seems I locked up and the crossfeed nut seems to have stretched above the cut and will not run the screw now. There was already a crack in the nut and wear in the threads, but I think I exacerbated it.
Sorry for the lengthy intro, but my question is does someone have specs on this part. I believe it is bronze as most are, but it seems to have an 8 pitch acme thread, which is a real bas##rd to find. I am not even considering calling Cincinnati to source part, and now I need to make one. I do not have a mill yet, so I am trying to find some specs for this part. Any and all help is appreciated.
Thank you