Well this is not one days work, but almost 3.
I started Monday night after dinner, this has got a lot of steps. 5 are accomplished before parting off.
Size the rod for the head diameter, then size the diameter for the major thread diameter. Then thread , chamfer thread, file threads and head underside corner. Then part off.
I made a template out of plastic to make sure I was hitting my lengths. I was using 2 micrometers 1 set for the head diameter one for the major thread diameter.
upto the 4th screw things were going well, but my foot was really starting to bother me standing on it. The next 2 I missed my numbers ... threw them out, and called it a night. I didn't need a 3rd.
Next day after sitting on the tractor in the morn, I tried again and got 6 more done, but I decided to make some extras in case.
Glad I did... I then made 3 more this morning. Then re-adjusted my form tool a little. I then formed the head on each screw. I found the best way was to use the carriage to come in, that seemed to give a better head than the cross slide. But sometimes the carriage would stop cutting and I would have to back out the crossslide and finish it up plunging the cross slide back in. Then onto the mill for slotting.
Glad I only had to do 10. BTW the thread is a #12-20 a special thread. He needed 10, I made 13... one the head is way undersized.. so really 12... This is for a hand plane, and only the first couple of threads will be used, the rest is in the wooden handle. The one in the front was the original sample he sent me.
View attachment 406176