I had to make a new draw bar yesterday. I machined a new one from a longer Bridgeport style with a heavier nut end and more thread engagement.
I bought a 20 1/2 " long Bridgeport bar, cut it down to 12 3/4" , drilled and reamed a hole in the nut end for just shy of 1" depth. Then tig welded the nut to the shaft.
I had to enlarge the hole in the top cover to fit it through. But its way better now. I feel more comfortable with having more thread engagement then I did prior.
How many threads of engagement do you guys have with your NM 200 Drawbar ?