Originally Posted by
redbeard
Great to know, I'll have to save up for a hefty airover. I'd really like to do some bigger stuff. How large a hole can you punch in 1/2"? I've got a bunch of 7/8 holes to do that I am NOT looking forward to drilling.
7/8" in 1/2" would about max out that 36 ton. Try a rotabroach, that would knock those out pretty easy with a good drill press or a mag drill.
Here is a tonnage chart, that will give you a rough idea of what it takes.
http://www.americanmachinetools.com/...punch_hole.htm
Long arc, short arc, heliarc and in-the-dark!
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