| Gallery, Projects and General > How do I?? |
| Threading stainless. |
| << < (2/7) > >> |
| NeoTech:
Well im not sure.. my compound when set to zero is parallell to the work. (the turning handle is pointing to the right). And then its degreed 60 degree either way. So i figured i just set it to 60 degrees case if i set it to 29.5 i just cut one side of a V thread.. it get flat on side. (yeap tried it, didnt work). But, hmm backing off before.. I need an extra arm or.. 2.. but it makes sense.. thats probably where it fails.. |
| andyf:
You need to set it at 60.5 degrees to the lathe bed, Neotech. That's 29.5 degrees away from perpendicular. Then, the leading edge of the tool does almost all the work, with the other side taking just a slight shaving off that flank of the thread to clean it up so it doesn't get tiny steps cut down it. And it helps to turn a run-out groove round the work where the thread is going to end, before you start threading. Then, you can stop with the tool in clear air. It looks like you have chosen some pretty hard stainless steel, though. Andy |
| NeoTech:
Yeah in retrospect it was a really bad choice of material to try with.. i have some mildsteel but its even worse, dont get a clean cut it looks all teared up. Funny enough it worked on aluminium. :scratch: |
| BillTodd:
A little extra speed usually helps with stainless (especially if using carbide) . You'll have to get quick with the cross-slide handle (or buy a hardinge ;)) I always thread with the top-slide set at just under 30° Imagine the /\ of the thread extending out wards - the top slide should point/feed in the direction it is cutting at the angle of the /\ \ for RH external and LH internal / for LH external and RH internal Sharp tools and the right cutting fluid help. |
| Pete.:
--- Quote from: NeoTech on August 29, 2012, 04:03:45 PM --- And Pete, the weirdo homemade tool you sent me, is AAawsome turning stainless with.. 1.5mm at each pass easy and i can go fast. --- End quote --- It should be - it's Deloro Stellite 100. I was down to my last few stubs (hence the weirdo tool) but then I found a load of it at a local place. In case anyone is wondering, the 'weirdo tool' is 20mm of stellite brazed tangentially to a piece of mild steel. It's awesome for holding it's edge - kinda half-way between HSS and carbide. |
| Navigation |
| Message Index |
| Next page |
| Previous page |