Ripping long angles? Can anyone tell me if I figured the correct angles?

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Forum topic by Split posted 08-22-2013 07:09 AM 1082 views 0 times favorited 2 replies Add to Favorites Watch
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33 posts in 1707 days

08-22-2013 07:09 AM

I am looking to make a corner gun cabinet. And from my drawings I have three locations where there are 90 degree angles I used the remaining 90 degrees figuring it would be two 45 degree angles to complete 360 degrees. Now that I am looking at it and playing with it I am not sure if it is right I started running into looking at a 135 degree angle which appears to be the same as a 45 if not obtuse. And read somewhere that to do it on a table saw it should be set to 22.5 which would be half of the 45 degree angle but my angles on the drawing at 45 degrees. I am so confused if anyone could help that would be much appreciated.


2 replies so far

View Loren's profile


10276 posts in 3616 days

#1 posted 08-22-2013 08:50 AM

Doing these as miters is not a common approach. Clamping
presents problems and cutting long miters is trickier than
cutting at 90 degrees. I would use rabbets or butt

You do seem to have the angles correct for mitering. If
you do want to move forward with miter joints, use
featherboards to hold the stock down as anywhere it
lifts the edge will be in error.

View Dave G's profile

Dave G

332 posts in 2016 days

#2 posted 08-22-2013 09:00 AM

Your drawing is accurate. See how the angled lines cross right through the corners of the blue grid. They’re 45 degrees. And when that is added to 90 degrees you get 135 degrees. You would set your table saw to 45 degrees.

It will be WELL worth your time to make sure your table saw really sets 45 and 90 degrees. There’s nothing more frustrating than miters that don’t close. There is usually an adjustable stop for 45 degrees (90 too). Make trial cuts to make sure you got them right. The easiest/best test is to join a couple cuts together to see if they reproduce a straight line. Then you’ll be convinced. This will get you to work your bugs out on some scrap. Then you’ll be more confident. And what you do will carry over into every other project.

Loren has great concern about the clamping. Unless I build the clamping right into the project, like Loren suggests, I have to use biscuits or hand made spline to stabilize miters before gluing and get REALLY creative with clamps and cauls.

-- Dave, New England - “We are made to persist. that's how we find out who we are.” ― Tobias Wolff

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