Rob G Posted February 1, 2009 Share Posted February 1, 2009 screw and nut set. 1" screw major diameter, 800" minor diameter. i am thinking bore a .810" hole in the nut and go in .100" deep with the thread cutting tool in both the screw and the nut. Quote Link to comment Share on other sites More sharing options...
irnsrgn Posted February 2, 2009 Share Posted February 2, 2009 might be a bit deep if you go straight in, most thread cutting on a lathe is done with the compound set at 29 degrees so you cut on one side and scrap the other, 60 degree thread is a perfect triangle, so 1inch divided by the number of threads is the amount to cut in at 29 degrees. Set the cross slide at .000, and the compound at .000. set the cutting tool so it just touches at center, crank in .015 look at the thread dial and engage on an even number, when you get to the end of the cut, crank out the cross slide to clear, disengage, return to start, set cross slide back to .000 and crank in the compound another .015, repeat till you have cranked in the compound the proper distance, then try the nut. Quote Link to comment Share on other sites More sharing options...
Rob G Posted February 2, 2009 Author Share Posted February 2, 2009 would this be ok with a 5 tpi acme thread ? i believe it is 29 degree sides. also, if the threads are cut .100" deep, how wide should the threads be ? Quote Link to comment Share on other sites More sharing options...
irnsrgn Posted February 2, 2009 Share Posted February 2, 2009 Acme threads are a whold different ballgame, you need an Acme Thread Gauge to grind the tool for taper and the flat on the end of the cutting tool. Quote Link to comment Share on other sites More sharing options...
irnsrgn Posted February 2, 2009 Share Posted February 2, 2009 Acme is 29 degrees, so you will have to set your compound at 29 degrees. Look at a machinists handbook. Quote Link to comment Share on other sites More sharing options...
Rob G Posted February 2, 2009 Author Share Posted February 2, 2009 ok thnx.... Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.