04-25-2015, 06:38 PM
This was not a good day for my nuts. 
First problem, I had the boring bar turned in the holder so the front below the cutting edge was rubbing. Took me a while to realize that. Didn't do much damage so I corrected that and just decided to continue on. Well, that didn't go well either. For some reason my thread passes are overlapping. I'm still scratching my head over that and haven't figured out why. I've checked the gearing and levers numerous times and they seem to be correct for 10TPI. I've ruined the first nut so I'm going to chuck up a piece of round scrap and cut an external thread and try to figure out why 10TPI threads are overlapping. Time to call it a day and take a fresh look at it tomorrow.
The chart for my lathe says for 10TPI I can use the numbers 1-8 on the half nut dial. Does that mean I can use any one of them or do I need to pick one and use only that one for the thread? I've always used the one I started with. It makes it a lot slower though waiting for the number to come around again.
Ed
First problem, I had the boring bar turned in the holder so the front below the cutting edge was rubbing. Took me a while to realize that. Didn't do much damage so I corrected that and just decided to continue on. Well, that didn't go well either. For some reason my thread passes are overlapping. I'm still scratching my head over that and haven't figured out why. I've checked the gearing and levers numerous times and they seem to be correct for 10TPI. I've ruined the first nut so I'm going to chuck up a piece of round scrap and cut an external thread and try to figure out why 10TPI threads are overlapping. Time to call it a day and take a fresh look at it tomorrow.
The chart for my lathe says for 10TPI I can use the numbers 1-8 on the half nut dial. Does that mean I can use any one of them or do I need to pick one and use only that one for the thread? I've always used the one I started with. It makes it a lot slower though waiting for the number to come around again.
Ed