I have an old South Bend Model C lathe that is in good shape and I would like to learn some single point threading on it. I bought one of those 3-D printed thread dials and it seems to work very good. However, the thread dial needs a cross fit set screw to keep it from moving out of position. The lathe is drilled and tapped for the set screw but I can't figure out what the screw size is.
#10 is too small and 1/4 is too big, so it appears that it might be a #12 screw with either 24 or 28 TPI. I have dozens of taps around to try to check the thread size but oddly, none were a #12.
Does anyone out there know the correct size of the set screw to lock down the thread dial?
Thanks.
Denny
#10 is too small and 1/4 is too big, so it appears that it might be a #12 screw with either 24 or 28 TPI. I have dozens of taps around to try to check the thread size but oddly, none were a #12.
Does anyone out there know the correct size of the set screw to lock down the thread dial?
Thanks.
Denny