AngryCorvair (Forum Supporter)
AngryCorvair (Forum Supporter) MegaDork
4/22/23 9:35 p.m.

Seems to me this stuff kinks worse than steel. What's the magic I'm missing? I think I kinda stumbled on something helpful, I slid one of those abrasion-protection springy deals over it before bending, and it kinda helped:

then I tried that plus heating with propane torch before bending but I couldn't tell if that gave better or worse result:

That's about a 1.5" radius. It's got some wrinkles on the inside and flattened out some on the outside:

Help please! MonZora needs you!

Patrick
Patrick MegaDork
4/22/23 10:09 p.m.

What are you using to bend it?

AngryCorvair (Forum Supporter)
AngryCorvair (Forum Supporter) MegaDork
4/22/23 10:15 p.m.
Patrick said:

What are you using to bend it?

First I tried a typical pliers-type bender with 2 small rollers a few inches apart on one side and a larger die on the other. That sucked. Pix above are from bending it around the round base of a clamp post on my welding table.

Patrick
Patrick MegaDork
4/22/23 10:20 p.m.
fasted58
fasted58 MegaDork
4/22/23 10:43 p.m.

In reply to Patrick :

That is or looks very similar to one I use, bought from an auto parts store 20 years ago. Good bender and once you learn the allowance for bends is spot on. 

I used Ridgid benders at work, they are great but pretty spendy tho. This ^ is the next best bender for the money.

I haven't touched the spring benders in decades.

 

Dusterbd13-michael
Dusterbd13-michael MegaDork
4/22/23 10:46 p.m.

I still kinked 3/8 nicopp with that type bender, Patrick. 

Sorry im no help. Never figured it out myself.

preach (dudeist priest)
preach (dudeist priest) SuperDork
4/22/23 10:48 p.m.

NICU

Just saying. 

Wish I could help. I just deal with nicu fasteners etc.

Streetwiseguy
Streetwiseguy MegaDork
4/22/23 11:27 p.m.

https://products.swagelok.com/en/c/hand-tube-bender/p/MS-HTB-6T

You probably don't want to buy this for one job, but you can form the most beautiful bends with one of them.

3/8 needs all the help.

ralleah
ralleah PowerDork
4/23/23 12:42 a.m.

Does sand packing work on stuff this small?

AngryCorvair (Forum Supporter)
AngryCorvair (Forum Supporter) MegaDork
4/23/23 8:32 a.m.
ralleah said:

Does sand packing work on stuff this small?

Unless there's some magic in "grain size vs tube diameter", I imagine it would. I considered it but didn't try. Maybe that'll be an experiment for later today. For now I'm gonna eat breakfast and go to HF and HD.

AngryCorvair (Forum Supporter)
AngryCorvair (Forum Supporter) MegaDork
4/23/23 8:26 p.m.

Got the tool Patrick referenced, results are a little better but not what I'd call great. Good enough though, and that's all it takes at this point.

JoeTR6
JoeTR6 Dork
4/23/23 9:14 p.m.

I used this for bending 3/8" and 1/2" stainless tubing.  It did a great job, but only cost $50 when I bought it.

Imperial tubing bender

Pete. (l33t FS)
Pete. (l33t FS) MegaDork
4/23/23 9:58 p.m.

Nicopp sucks to bend, it is so soft that it folds far too easily, even worse than plain steel.

 

Plastic coated steel is my go-to, it seems to be the best compromise for workability.

I have a version of the one that Patrick linked, it works "best" but you still need to keep a certain amount of tension on the tube you are bending so it doesn't pull up and fold.  Definitely a tool and work material that you need to develop an amount of skill to use if you want good results, and you will still end up folding a bend from time to time, usually the last bend on something you needed to make four bends in.  Lubricating the moving part (shoe?) seems to help, as the problem seems to be because there is more friction on it vs. the stationary part.

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