On Sun, 21 Jul 2019 22:59:01 -0700 (PDT), whit3rd
wrote:

On Sunday, July 21, 2019 at 5:42:28 AM UTC-7, Jim Wilkins wrote:
http://en.sanouchuck.com/english/pro...p?id=45&type=5

Looks intriguing; the presumption, then, is that somewhere in the world
is a rolling mill turning out pentagonal bars? And mill vise jaws with
108 degree and 36 degree vees?

The pentagonal spud on a fire hydrant cap/valve is the only item I can easily
imagine this chuck holding.
They seem to be more common - if you can call it that - on
wood-turning lathes. 6 jaw is more common withthe same advantages if
NOT chucking penta stock.