How to Bend Tubing
Intro: How to Bend Tubing
Here, I show a quick and dirty method to bend aluminum tubing. I am documenting how I built a new bow rail for my sailboat.
STEP 1: Build the Jig
Here, I trace the curve that I want on some scrap lumber. This scrap will be used to build the bending jig. I'm just using a couple of old 2x4's. Your wood should be somewhat thicker than the diameter of the tube you wish to bend.
STEP 2: Cut the Lumber
Just cut out the traced jig. Use a bandsaw if you have one. I don't so, I just used a jigsaw. Cut the jig to be little smaller than the desired curve. This will allow for the spring action of the tubing.
Since I used two pieces of 2x4, I made a little gusset to hold the two together (2nd pic).
Hint: Add a little bevel inward on the bottom of the cut. This will keep the tubing from popping off of the jig when bending.
Since I used two pieces of 2x4, I made a little gusset to hold the two together (2nd pic).
Hint: Add a little bevel inward on the bottom of the cut. This will keep the tubing from popping off of the jig when bending.
STEP 3: Don't Bend Like This.
If you do this, then you will almost certainly get a kink in the tubing.
STEP 4: Ready to Bend
Here, you can see that I take a piece of scrap (from the earlier cut) and attach it to the table to complete the jig.
You will want to bend from one side only while ensuring the tubing is supported wile bending. While bending, try to keep the pressure against the jig instead of the tubing.
You may want to practice with some cheap amluminum conduit to get the hang of it. When you are ready, get the polished stuff.
Have fun.
You will want to bend from one side only while ensuring the tubing is supported wile bending. While bending, try to keep the pressure against the jig instead of the tubing.
You may want to practice with some cheap amluminum conduit to get the hang of it. When you are ready, get the polished stuff.
Have fun.
71 Comments
galapagos.duck 9 years ago
That liquid foam no more gaps stuff in a spray pack works well too. It dries real quick & my aluminum pipes don't flatten/kink when I bend them. if you need to get rid of the foam when your done bending,,,then just start pouring small amounts of acetone in one end & it will eventually dissolve.
jcmaner 14 years ago
SDX42 10 years ago
ehmbee 11 years ago
bertus52x11 10 years ago
sporgo 10 years ago
chiefredelk 11 years ago
Evox_Rider 14 years ago
GreyBird 12 years ago
PaulE 14 years ago
Just pull very hard and go slow. You keep the conduit very tight against the jig.
Evox_Rider 14 years ago
Punkguyta 16 years ago
jongscx 16 years ago
NinjaBear 13 years ago
gossumx 13 years ago
jayeshshinai 13 years ago
RWWESTdesignworks 12 years ago
jayeshshinai 12 years ago
Murdok 13 years ago
rwhorton 13 years ago
I successfully bent brass tubing using molten lead (which I reheated and removed later) inside the tubing. If you are not trying a real tight curve, then this should keep kinks from forming.
Another way I have seen, but never tried, is to freeze water in the tubes, and then bend them. (Saw this on T.V.) I imagine you could place your pipe into a freezer, as long as it will fit.