| Gallery, Projects and General > How do I?? |
| ...mount this threaded backplate on my non threaded lathe? |
| << < (2/4) > >> |
| philf:
Andy, Lester said in his original post: I don't think I can get a 12tpi thread out of my metric lathe, either. Hence why I suggested he find a willing local Myford owner. Phil. |
| BillTodd:
12 TPI is near enough to 2mm to get a few threads engaging - enough to hold the backplate while carefully machining the face to fit your chucks. Make a replica myford nose, with accurate registration faces & diameters, on a piece of scrap held in a 3JC . Cut a loose-ish 2mm pitch say 10mm long. Do not remove or disturb the adapter until ALL the machining on the face-place is complete. (NB it's a good idea to support the face-plate with a revolving centre in the tail-stock while facing - it removes any float in the spindle bearings. You may need a small pad to fit into the thread, to be able push on the face-plate - so make it first Final finishing passes should be cutting dust ;) Bill |
| Rob.Wilson:
mount a length of bar and only turn the register ,forget about the 12 TPI and bolt the back plate to the bar for turning . Rob |
| andyf:
Ha, I missed that bit, Phil. Bill, we can get Lester a lot closer than 2mm pitch (12.7 TPI). According to the calculator at Little Machine Shop, A 45, B 35, C 55, D 50 is one of four combinations which will produce 11.973 TPI on a 1.5mm pitch mini-lathe , assuming that the Chinese leadscrew is dead on 1.5mm pitch. Andy |
| philf:
--- Quote from: RobWilson on December 11, 2012, 03:15:35 PM ---mount a length of bar and only turn the register ,forget about the 12 TPI and bolt the back plate to the bar for turning . Rob --- End quote --- A Gold Star for you Rob! :clap: Why didn't I think of that? Phil. |
| Navigation |
| Message Index |
| Next page |
| Previous page |