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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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lathe cross-slide backlash adjustment idea
In article , "jt" says...
1. How common is the existing method of adjustment? Mmm. Not very, IMO. 2. Do I need to worry about these teeny-weeny screws having to do all that work? Yes. 3. Is the method I thought of reasonable - is it by any chance novel? One very common way to do this is to make the long nut in two sections. And then rig a means of adjusting the separation between the two. For example, Hardinge pins one bronze cylindrical nut into the casting, and threads another similar one in on top of it. By turning the adjustable one, one can trim out the fixed lash in the nut. Another common setup is when the long square cross section nut, like you have, is slit along one if its sides, and a clamp screw tightens down. This is somewhat less precise than the hardinge method, but probably a *lot* better than the teeter-totter technique. Jim ================================================== please reply to: JRR(zero) at yktvmv (dot) vnet (dot) ibm (dot) com ================================================== |
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lathe cross-slide backlash adjustment idea
"jim rozen" wrote in message ... In article , "jt" says... One very common way to do this is to make the long nut in two sections. And then rig a means of adjusting the separation between the two. For example, Hardinge pins one bronze cylindrical nut into the casting, and threads another similar one in on top of it. By turning the adjustable one, one can trim out the fixed lash in the nut. I thought of that, but wasn't sure there'd be enough room for another set of threads; plus the nut fits inside a channel under the slide which means it may be limitedto turning in 90 degree steps. I also thought of two nut sections, and a set of four teeney-weeny screws running along the long axis in the corners of the nuts, two to pull, two to push. Keeping it square might be trouble. |
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