Mitre Angle

Thag

I need to mitre angles that are greater than 90 degree and less that 180. How do I figure this out. Thank You

neolitic

Measure the angle with your T-bevel.
Put the handle on the edge of a piece
of paper and make a pencil mark along
the blade.
Now, fold the edge over to the pencil
mark and crease it carefully.
That is your miter angle.

Or you can do a lot of math,
or spend a bunch of money for
a digital angle finder.

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dkillianjr

I was just doing that today. I picked up the bosch angle finder a while back and ever since its been real easy just a push of a button. But before that I would just take two peices of wood hold them on the angle, mark a line and just cut the angle. I'm sure someone else will know a real way of doing it though



Dave

Thag

Thanks brother, I understand what you are saying. Very helpful.

dkillianjr

Wow! thats a sweet trick neolitic, I have never heard that one before. I'm deffinetly gonna give that a try.


Dave

Thag

These are inside corners for crown molding. Tray ceilings with an octagon shape.

neolitic

Same trick.
½ the angle is the miter cut.

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Thag

Thanks dude, I owe you one.

Railman

I always found it easiest to just guess, & adjust. Just take a scrap pc of base or 1x4, cut in half at guessed angle, take both ps & test fit. It usually takes a couple treis, but it's very easy, & don't hurt your brain! It only works if your cutting crown in nested position...not laying flat.
Joe

Thag

I've done it this way also. Just looking for an easier way.

LEVELBEST

Tbevel? LOL. No. Go buy a Starrett angle finder for about fiddy bucks. They come in very handy. You can get a large or small version for different applications. I think this is what you need, unless I am not understanding your question. This tool tells you what to set your miter saw on whether it is a straight cut or a miter with two pieces. I have one and I love it.t

http://pros.servicemagic.com/product...t-505A-12.html

Riversong

If you have a compass (scribe), put the point at b on the ceiling and swing an arc from wall to wall. Then put the point at 1 and swing a short arc near the middle of the angle, and move the point to 2 and swing another short arc intersecting the first one. Place a bevel gauge along one wall with the blade hitting the x and transfer that angle.

billy d

Hi guys new guy to the site here from what I have seen so far 1stclass.Neolitic has it right half the angle is the mitre must say though I have never tryed it with paper.This is how I learned it.Take a sliding bevel and pick up the angle from the wall.Take 2 pieces of timber,they must be the same size (ie 4by1).Hold the sliding bevel with the handle against the face edge of one of the 4by1 make a mark on the timber (I prefer to use a knife neater angle).Place the other piece of timber flat against this mark and mark the other side.You now have 2 parallel lines on the timber.Join the top left hand mark with the bottom of the right hand mark you now have the mitre.Bit long winded but once you have seen it,it takes 30secs tops to do it and its with you for the rest of your life.You can use it any where btm boards, covings, dado rails, bar counters any where.If your doing it all day every then Level best has it right but under standing the principle never hurts.Hope this helps have fun.

buildenterprise

I've got this one, best $25 I ever spent.



http://www.amazon.com/Denali-11-Inch...5670911&sr=1-1

Mrmac204

half the reciprocal

or...

my shortcut

whatever the measurement is over or under 90 deg - then figure out its "reciprocal" ie: if your corner measures 94 deg, (4 deg over 90) subtract 4 deg from 90 = 86 deg. 1/2 of that? is 43- and that's where you set your mitre saw. same thing goes for numbers less than 90 deg - 82 deg? then that's 98/2 saw is set at 49 deg .

I know this isn't exactly pure math (the corners are 270 deg, not 90 ((( 270-180=90)))) but I find that it works great on the fly.

Mac!

Riversong

The reciprocal of x is 1/x.


Maybe the miter saws north of the border work differently than down here, but we gotta set our miter saws at half whatever the overall angle is.

And down here, an inside corner is 90° and an outside corner is 270°.

MALCO.New.York

Certainly are up here as well. In a perfect world!

If they are YOUR walls...No excuse. If not, then NEVER assume square and plumb!

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neolitic

Same as with the paper.
Except you can lay the folded
paper on the miter saw and
use it to set the cut angle too.

The T-bevel never needs batteries.
You have a digital chisel too??

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Double-A

Digital Chisel used by Nose Miners everywhere (shown in the deployed and ready position).

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LEVELBEST

huh? I dont have a digital finder. Mine doesnt run on batteries!? I am lost here guys, what you talking bout willis?