I turned my first threads yesterday and had a hard time, I was told by a buddy to turn them by hand and that some people adapt handles to the spindle. Today I made an adapter for just that:
here are some dimentions.
Here is the actual part:
I made mine out of delrin because I have an abundance of it and its easy to machine. When I finished I remembered that delrin is self lubricating and to hope it wouldnt slip. luckily I measured wrong and was off by about .03" so I just wrapped electrical tape around it and it works great!
The threads are 5/16 18 because thats the nut size I had laying around. The handle came off of my mill. I won't be using it anymore as I have steppers in place of it
I would almost suggest using aluminum or some other material that may grab by itself.
I havent used it yet, I am looking forward to trying it out.