Miter cut - Woodworking Talk - Woodworkers Forum
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post #1 of 15 Old 08-01-2018, 11:31 AM Thread Starter
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Miter cut

Hello,
I need help with a tricky miter cut. I am trying to figure out the correct cut for a ceramic trim piece. It is a 1/4 round crown molding type piece that fits between a wall and a flat surface (a bathroom wall and the top side of a tub).
I have measured the angle and it is 115, so I calculated a 32.5 cut. I think the problem is I am trying to connect a horizontal piece of trim (which goes along the top side of the tub) to a vertical piece (which comes up the side of the tub. The angle I mentioned is the vertical angle between the two pieces. Any help would be appreciated.
Thanks,
Doug
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post #2 of 15 Old 08-01-2018, 12:35 PM
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frankly I would need a pic on this one, or at least a good sketch.
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post #3 of 15 Old 08-02-2018, 01:11 PM Thread Starter
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Here are a couple of pics. Would appreciate any help.
Thanks.
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post #4 of 15 Old 08-02-2018, 01:22 PM
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Don't they sell corner pieces just for that purpose?

Dave in CT, USA
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post #5 of 15 Old 08-02-2018, 02:05 PM Thread Starter
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No because this is not a standard 90, it is 115.
post #6 of 15 Old 08-02-2018, 03:20 PM
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OK, could you use a 90° corner and modify it? Cutting an exact miter on those pieces will leave a sharp corner.

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post #7 of 15 Old 08-02-2018, 05:32 PM
where's my table saw?
 
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You simply bisect the angle ....

Quote:
Originally Posted by [email protected] View Post
No because this is not a standard 90, it is 115.
Your angle of 115 degrees, which I am suspect of, divided by 2 equals 57.5 degrees. If both sections are identical and you are just wrapping the corner it should fit fine. A setting of 37.5 on the miter saw should work.... 90 - 57.5 = 37.5.
How did you measure that angle... a digital protractor or an adjustable angle gauge? This means that wall is opening away from the other wall, right? Two pieces of heavy paper fitted against the walls and taped together at the intersection, then laid on a protractor would give you an accurate reading.
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The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
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post #8 of 15 Old 08-02-2018, 08:00 PM
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Quote:
Originally Posted by woodnthings View Post
Your angle of 115 degrees, which I am suspect of, divided by 2 equals 57.5 degrees. If both sections are identical and you are just wrapping the corner it should fit fine. A setting of 37.5 on the miter saw should work.... 90 - 57.5 = 37.5.

90 - 57.5 = 32.5



In woodworking there is always more then one way to accomplish something.
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post #9 of 15 Old 08-02-2018, 09:36 PM
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Now I feel stupid ....

I never was good at math and throw in a typo and you'll never get the correct answer.

Thanks for the correction. At least someone is paying attention.

The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
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post #10 of 15 Old 08-03-2018, 06:08 PM Thread Starter
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See attached for measurement. I'm not wrapping around the wall. I am going down side of tub.
post #11 of 15 Old 08-03-2018, 06:12 PM Thread Starter
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post #12 of 15 Old 08-03-2018, 06:53 PM
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it doesn't matter, either way ...

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Originally Posted by [email protected] View Post
See attached for measurement. I'm not wrapping around the wall. I am going down side of tub.
Bisecting the angle is still the only way I know to have a good joint. I would take 2 pieces of 1/4 round wood make the cuts at 32.5 degrees and see how they fit. Let us know with a photo or a

The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
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post #13 of 15 Old 08-03-2018, 09:48 PM
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Quote:
Originally Posted by Maylar View Post
OK, could you use a 90° corner and modify it? Cutting an exact miter on those pieces will leave a sharp corner.
I would still take this advice, just cut it in half and adjust the angles to give you the 115 degrees so you have that round corner.

Wise men speak because they have something to say; fools because they have to say something -Plato

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post #14 of 15 Old 08-03-2018, 10:03 PM
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I would cut a couple pieces of scrap wood to the same dimensions as the tile pieces and fit those first. Wood is much easier and faster to cut and shape. Once you're satisfied with the fit of the wood pieces, transfer those measurements to the ceramic and cut once.
Same idea as the paper pattern, just a more 3-d fit if there's a compound to the joint.

Last edited by pro70z28; 08-03-2018 at 10:06 PM.
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post #15 of 15 Old 08-04-2018, 05:53 AM
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Here’s the approach I would take, assuming you have some spare tile.

Hold the tile pieces in place so the points touch.
Eyeball the angle and draw two lines, one on each piece, making them about 1/8” apart so they’re parallel to one another and look like they’re splitting the angle.
Cut to those lines on the tile saw.
Put the pieces back in place, butting them together where you made the cut.
Draw two more lines, adjusting a bit if the angle on the first try wasn’t perfect.
Cut the lines, butt them together and see how it looks.
It doesn’t have to be completely precise since you’ll want to leave a gap and grout it anyway.
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