i own one of those, got it from an Orchidian vendor actually I forget
the name right this minute. it works quite well for what it is.
having said that I worked in the industry for over 25 years and have
had the expierence of using the industrial ready made cavalins, and
the machine shop custom made joby, and while working /teaching at the
University we had one that was home made right there at school, 2x4s
a winch steel cable some forged steel holder plates…
there is no comparison as far as the industrial one is conserned ;
power and heft of metal you are drawing down,could go up to 2 or 3
gauge that would be in the ball park of 4-5-6 mm thick with out a
problem. none. the others home made or machineshop made do okay, with
limitations. the one I bought is made of aluminium, but fairly solid
and pretty good power ratio.
i would definitly bolt it down to a bench if i were drawing down
anything larger then 14 gauge/1. 5mm. it has done fine up to 3mm. i
have not tried anything thicker yet. I suspect it will be fine, but
will take a little longer then it’s industrial counter part of
cavlin, cavlin runs on a heavy duty chian that looks like a Bycicle
chain gone on steroids, the other uses a sort of an Auto sit belt
strap material for the Pull ring, and a medium weight winch, which
stretches under stress. not a good thing. but still for a small
studio on a budget it works fine. i bought mine for around 180. 00.
vs 1000. 00 for the cavlin small version.
I am sure you know they go up a lot higher in price then thatall the
other home made models I worked with used thick steel cable which in
hind site i recognize is much more dangerous then the sit belt strap.
the strap sits flat on the beam it is running upon, where as the
cable always had tendencies to pull to one side or the other making
it dangerously close to the edges or a chance to jump off of the
raised edges. and I used the older versions long enough to see the
steel cables come unravled and snap cut or start fraying and reek
havoc on the whole draw bench because people in the work shop just
kept useing it as is. i have not had the draw bench long enough to
have the pull belt get old and abused, but i suspect it won’t do that
since I would take care of anything like that ASAP.
my opinion as an owner of one off these units is, it’s worth the
money, good value for the small shop that does wire drawing on a
weekly basis. and if you were doing thinner material like 18g/1mm it
is a dream. it gets a harder when you go up in thickness of wire, but
if you respect the tools limitations it will work. you can make one
that may have a much heavier base and winch, but for me the time
spent away from the bench did not justify the making of a tool that i
will use once or twice a month.
hope it helped