- Joined
- Dec 6, 2015
- Messages
- 829
I've wanted to do some metric threading for my South Bend lathe (10L). I'd even gone so far as to create a 127-hole dividing plate (I still have it). But when an old Sheldon lathe metric conversion gear (127-tooth, 16DP) popped up on eBay, I went with it. It was a compound that was attached to a hub, so I dismantled it in a way that I can always put it back together, and then made a 100-tooth gear and sleeve for the compound.
That let me cut a really ugly-looking thread (I didn't care about lead-in chamfers - according to BlondieHacks, I'm an animal). I did goof in my math - but it was close enough on one end and left a gap on the other) after finding the double-tumbler gear chart was for a standard quick change gear box, not the wide range I have on my lathe. Still, it did what I needed it to.
Now I need to find a proper thread pitch chart, or make one (might be an excuse to break out the vinyl cutter and etch one).
That let me cut a really ugly-looking thread (I didn't care about lead-in chamfers - according to BlondieHacks, I'm an animal). I did goof in my math - but it was close enough on one end and left a gap on the other) after finding the double-tumbler gear chart was for a standard quick change gear box, not the wide range I have on my lathe. Still, it did what I needed it to.
Now I need to find a proper thread pitch chart, or make one (might be an excuse to break out the vinyl cutter and etch one).