Hot Rods Cutting Compound Angles

Hi Guys
I need to cut some compound angles in 2x4 boxed tubing, and I don't want to buy a big cold cut saw. does anyone have some tips or tricks to help me out on this.....Thanks in advance.
Mike

 

Ray....I wanting to build a frame for my '38 plymouth and there will be some compound angles involved, Don't want to run my wood saw with cold cut blade, so looking for another way to cut compound angles.
Mike

 

a cut off wheel and a speed square for the angle

 

I agree with above comment. A cut off wheel and/or a plasma cutter would work. But unless you can borrow a plasma cutter, that would be costly. Cut wheels and tool is relatively inexpensive and useful to have in general.

Ray

 

Can you simulate the compound cut on an wood 2x4, or wood of the size of your 2x4 tube and then transfer the lines with silver pencil to your steel? Then cut your steel with 4" cut of wheel.

 

I use a Portaband for these kinds of cuts.

 

look around locally for a master carpenter, he can show you how to figure out compound cuts.

 

If you are looking for how to make the cut, a band saw or cut off wheel is easy

If you are looking for how to mark the angles, a template in paper wrapped around the stock for mock up is how I do it, you can also buy tools to do the same thing.

 

Wait , compound angles.! Skilsaw with metal cutting blade.

 

Layout the angle on all 4 sides of the rectangle tubbing and use a cutoff wheel


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Over the years...with care and planning...a Sawzall with a good blade has proven its worth for cutting steel tube in a variety of shapes and angles.

 

as already said....lay it out on all four sides. then cut it a bit proud with a cutoff wheel , sweeten it up with a grinder

 

Chop saw.
Take your pick. They are reasonable.
Plenty of uses for these even after this project.

https://m.harborfreight.com/power-tools/cut-off-saws.html?utm_referrer=direct/not provided

 

They aren't compound capable.
I've stuck a steel blade in a compound miter saw though.

 

with good lay out lines [filed or scribed] you can cut the tube "proud" with a torch using a scrap piece for a guide, then grind to the line. just be careful to tilt the torch, on back cuts at the corner.

 

Yup, if you can

 

Angle and a hack saw. Kidding...

 

Stick the tube in a can of old paint at the angle you want use the paint line as your mark and use a 4" cut off wheel

 

Jummimey christmas

 

what was the question?

 

Bisecting angles:

 

Neat trick. I have been doing it the hard way all these years. You CAN teach an old dog new tricks!

 

Wow I like that Youtube.

 

cool beans!

 

A couple of cheap 2x4s would be an inexpensive sacrifice to know you were getting the angles right on the first try. cut the wood and make sure your angles are right and then transfer the angles to the metal and go.

 

The OP wants to know what tools to use to cut a mitered joint instead of buying a compound miter saw.

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He wants to know how to cut a "Compound cut" not a mitre cut without buying a compound miter saw.
A compound cut is cut at an angle on 2 different planes.

 

Yes that’s what I thought also.
Angle grinder and guess work is how I would do it on tubing.

 

I've done it this way, you've really got to want it done. Speed square or good framing square will get it laid out, 4" grinder with cutoff wheels will get the job done.

 

I use maths ,a bevel and a scriber to mark everything.
You need to think in 2 dimensions ,there is 4 x right angle triangles.

And if maths is not your forte click onto this site.
http://www.csgnetwork.com/righttricalc.html

After that , the good ol' 1mm cutoff wheel in a grinder.