Andre' Blanchard wrote: > At 11:23 AM 6/29/2007, you wrote: >> trial and error. I have a project of machining a back plate for an L&W >> dividing head, the thread is 2-1/4 10tpi. I dread test fitting the >> dividing head to the back plate! >> >> Roger Neal >> > > Make up a few simple rings from scrap and do a trial run or three. Then > when you know it is cutting the thread size you want do the back plate. > __________
Good idea. Another idea I've heard of when making up chuck backplates and such is to make a dummy spindle nose. Its a lot easier to measure an outside thread. So make a male thread and measure it so that you know it is exactly the same as the actual spindle nose (but a lot easier to handle). Then use that as a thread gage when making the female thread in the backplate. That way you can test the female thread without removing it from the lathe (which would make it impossible to go back and take another cut). If I was making a backplate, I'd make the dummy spindle nose first. Then make a test piece with the female thread, testing it with the dummy. Once it seems right, remove it from the lathe and test it on the actual spindle nose. Then make the real thing using the same settings, but testing with the dummy spindle nose as it approaches final size. Regards, John Kasunich ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
