Thread: How To: Notching tubing

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Hey guys, I don't know how many of you do your own cage or chassis work but this how I set up my jigs for notching tubing.
I set all of this up on one of my jig tables but it will work on any bench or table top you have handy.
These pics show my Harbour Freight tubing notcher clamped to a 90* angle plate. This is simple to set up and doesn't require a lot of thought...

From the backside...

Cutting the first notch is the easy part. No orientation, no length to worry about. Just clamp the tube in the notcher and do the deed.
Cutting the second notch is where some planning needs to be done. Getting the LENGTH and the notch ORIENTATION correct is critical to having a usable part versus something to practice welding on...
To do the second notch I bolted a short piece of the mating tubing to another angle plate and use this to nest the "first" notch into while cutting the second notch.

This way I can establish the correct length AND notch orientation in one easy step... Set the tubing length between the outside diameter of the tubing and holesaw, in this case 23 inches, square up the jigs, clamp it all down and cut the second notch. Once it's set up any additional tubes will be identical to the first so measure twice and cut once...

Cutting the second notch...


Thanks for looking
Mark

Thanks guys,
I got a little bit done over the holiday weekend. Didn't have a lot of shop time but I did take advantage when I could...
Got the notcher fired up and ran the lower crossmembers through it. It took about half an hour to get the jigs set up and another half hour to run the tubing through.
I use Castrol wax lubricant on the hole saw. This stuff works really well and doesn't make the mess that WD-40 or cutting fluid does. It also cleans up easily.
I can do one notch in about 30 seconds running the notcher with my 1/2" Milwaukee drill. This set up makes for a clean cut and, with a little clean up with the angle grinder, I have some quality notches that fit well for Tig welding.
Thanks for looking.
Mark

looks a lot better than doing it with a cutting torch.

Originally Posted by lt1s10

looks a lot better than doing it with a cutting torch.

Thats the way it used to be done.My Dad would probably frown at the use of these tubing notchers.

Originally Posted by BigTruckDriver

Thats the way it used to be done.My Dad would probably frown at the use of these tubing notchers.

they sure do make it pretty though. you're making it to easy for the welder.

We have a notcher and use it alot. It works great and other than use up a hole saw at midnite after the stores are closed no real problems. My son was amazed when I finished the job by using some careful cuts with a band saw. Kinda like "big truck driver's " dad. haha " how did you do that??" he says. We built whole cars with nothing more than a band saw and flame saw.

older than dirt.

Originally Posted by lt1s10

they sure do make it pretty though. you're making it to easy for the welder.

I know,my Dad tig welded fuel dragsters(joints had to be perfect),so you could imagine how time cunsuming it was with out the speed of the tubing notchers we have today.But I guess thats why he was a pro.On my best day I would not be half as good as he was.

I used to use much the same method, but a fixture on my drill press table and a stand to hold the other end of the pipe. For orientation of the second cut, I use a 90 degree magnet to hold another piece of tubing in the first notch I cut, then a magnetic base angle finder to set the correct degree of cut on the 2nd notch. Currently working on an indexed fixture to do my notching with an end mill on a vertical lathe, or a very heavy duty drill press...... Trying to make the process faster and more accurate.

Hey Dave, this process is very quick. Once I got the jigs set-up I had all of the notches done (6 of them) in less then half an hour and that included cleaning them up with a grinder.
I did a quick mock-up of the new lower rails and crossmembers to see what the fit-up looks like. The notches came out great and I have some really nice, tight fitting joints for welding.

A couple more...

I still have to clean up all of the welding surfaces yet, this is just a look see for fit-up. I will go over all of the joints with a flap wheel on the die grinder to prep for welding...
Mark

I use a sawzall,and have gotten pretty fair at notching,but I'd stop in a second if I had a jig like that. Hank