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My Tubing Bender

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snub:
I've never used one of these nor seen one except in pictures. I decided to build one using ideas from others, but throwing my own ideas in as well. I built 3 rollers and 3 'follow blocks' for 3/16", 1/4" and 3/8" tubing. They are 1" high so that in the future I might be able to bend 1/2" and 3/4" tubing. Here is a pic of it without the follow block in place. You can see the roller bearing that is encased in a block that has 8 pins for guiding it in fore and aft movement, depending on the diameter of the roller. The threaded handle pushes on the block and hence the bearing.



A couple of pics of the block and bearing:






Here are all the pieces:



All set up and ready to bend:




As you can see below, at 90˚ I have run out of follow block. The only insight I had into the length I should make it was from DiAcro, which said the length of the follow block should be 3 1/2 times the radius of the roller for a 180˚ bend. Perhaps my math is wrong. Anyways, I just backed off on the handle and reset the block.





And finished:

BarryG41:
A nice job and very well designed. I made a bender years ago for a production application. Only for 5/16 tube, in comparison mine looked  like it was gnawed out of steel by steel eating rats.

Barry G 

Bogstandard:
Snub,

The way to get around the follower block problem is to use another roller with a groove cut in it, it works like an infinite length follower block.

John

Bernd:
Snub,

Nice piece of tooling you've made. Really does a nice job of bending.  :thumbup:

Bernd

DaveH:
Snub,

Nicely made and a useful bit of kit. :clap:

DaveH

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