I have a project I'm working on that requires I use a 1/4" threaded
steel rod, bent to a precise radius. I've tried doing this by hand, but
there the bend is not uniform along the entire length with some places
more bent than others. One person suggested I try a jig like this:
Tried it after building out of scrap lumber today, but it wouldn't begin
to bend the rod as that unit is designed for wire.
Any help would be appreciated. Trying to keep costs down and a DIY
project in case I need to do it again sometime.
Are you building one of a kind, or do you need
several? Tell us more about the radius needed.
Spaghetti jar? Holesaw from the hardware? Coffee
The jig will need to be smaller than the end
product, as it will "relax" a little.
On 08/09/2014 09:03 PM, firstname.lastname@example.org wrote:
The link I mentioned above has plans for exactly that 3 roller jig which
I built yesterday. Initial testing showed that it will adequately bend
the rod, but unfortunately it shapes the resulting rod into a spiral
shape as well. Not sure why. All I need is the radial curve in a flat
shape not a spiral!
With threaded rod you need to compensate for the thread when you run
it through the rollers. The allthread will attempt to turn as it goes
through the rollers. You need to twist it against that tendancy as it
On 08/12/2014 07:57 PM, email@example.com wrote:
Just wanted to update here that the pulley system worked! I couldn't
find the v-belt pulleys locally anywhere cheap, but there were some 1.5"
metal pulleys that could be bolted down. I picked up 3 of those and
used a much heavier 2x4 as a base. I drilled a series of holes for the
center pulley so it could be moved into the rod as I worked the rod
through the system. I decided to try out the 1/4" spare steel threaded
rod first and as long as I bent in increments, all went well. Finally
came the brass 10-24 rod I really needed to bend, and the process was
easy. I was even able to fairly straighten out the spiraling that the
prior rods had after using my other system, but I was never able to
nullify it completely. The 3rd dimension did not show up, at least not
very much at all, with the new metal pulley system. I didn't actually
use a t nut, but had the rod marked so that I would see the same mark
facing me throughout the process. This worked out fairly well.
All in all, a nice system. Fulfilled the purpose, and easily broken
down and stored for easy access later if necessary.
A big thank you, especially to you, Clare, for suggesting the pulleys in
the first place and how to set them up.
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