15-03-2022, 10:12 AM
To return to Squeak's suggestion of a broach drill, I assume that we're talking about something like the items in the photo(?).
I'd need to check the internal diameter with the supplier, but I guess that it wouldn't be the end of the world if it wasn't exactly 5/8" - I could re-thread to the nearest available size, I suppose.
The major practical issue would be setting the radius arm accurately. I'm wondering whether I could fix them rigidly to the lathe cross-slide and hold the broach drill in the chuck.
Better ideas would be welcome!
I'd need to check the internal diameter with the supplier, but I guess that it wouldn't be the end of the world if it wasn't exactly 5/8" - I could re-thread to the nearest available size, I suppose.
The major practical issue would be setting the radius arm accurately. I'm wondering whether I could fix them rigidly to the lathe cross-slide and hold the broach drill in the chuck.
Better ideas would be welcome!