Jason.
I thank you for the response, I figured we needed the spec, but as I don’t have it I still would like to give it a try as this is just an experiment and I get a little machine time plus I get to learn a new technique. I chose the acme thread as I have a set of external and internal cutters I don’t for a square thread.
Stew,
I think you are right, tough is what I need that’s why in my mind I thought of case hardening. I have a set of Bessey Bar F style clamps made for welders, in fact I have a set of ( 4 ) - 12” jaw opening and they come straight from Germany and I have a set of (2) – 8” opening made by bessey but manufactured in India, if you try to score a file to either the bar frame or thread on the German manufactured clamps it won’t touch it, but on the India model the thread are not quite as hard and it scores, another anomaly is that both sets have the same diameter thread ( only difference between both sets is the jaw opening ) the German made clamp while applying pressure will act smooth and seat itself in a sturdy fashion, on the India model you apply the same amount of pressure and it starts to creek and whine and as you reach the max pressure it shudders and stops, I never have put a torque wrench on the pair but I can tell you I believe the German model applies and holds more pressure.
Saying all that, this is where I got my idea for my own clamp design and I noticed the properties of the for mentioned clamps and I attribute the differences to the hardening that gives you their variance in performance. If I am missing something please share.
Bob.
Thanks for the information but this is me tinkering in the shop and trying to learn a little on DIY hardening projects i do not want to spend any money, i just want to use what i have
Any other ideas are more than welcome. Thanks to all again. Anthony.