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Tool Talk Discussion Forum

Mitre cutting crown molding for corner cabinets

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Bill in TN

10-11-2003 14:08:42




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Trying to get the final touches on the wife's updated kitchen. I'm adding the crown molding to the cabinets and I'm stuck. I have 90 degree cut the molding on both wall cabinets on each side of the corner cabinet. I then cut a 45 for the corner cabinet and it doesn't match. I've played with scrap and still can't figure out what I'm doing wrong! Can anyone end my misery?




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Alberta Mike

10-13-2003 06:46:13




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 Re: Mitre cutting crown molding for corner cabinet in reply to Bill in TN, 10-11-2003 14:08:42  
Maybe I'm visualizing this corner cabinet layout incorrectly but if it is 45 degrees from the other cabinets, then there is a 90+45=135 degree angle between the corner cabinet and the wall cabinet. Does that make sense? Cutting this in half would give you a 67.5 degree angle. And someone else mentioned below the fact that you MUST have the two flush sides of the mouldings tight with the base and the back wall of the mitre saw. Does this seem to be correct for you?

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Alberta MIke

10-13-2003 06:47:47




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 Re: Re: Mitre cutting crown molding for corner cab in reply to Alberta Mike, 10-13-2003 06:46:13  
Just realized that my 67.5 degree angle is 22.5 degrees short of a 90 degree corner. I guess it would be the same either way.



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Al W.

10-12-2003 21:57:52




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 Re: Mitre cutting crown molding for corner cabinet in reply to Bill in TN, 10-11-2003 14:08:42  
the true mitre for this is (in rise to run terms) 17" run per 12" rise. lay this out on a table and apply a protractor to it to get degrees, set that on a mitre saw and set the peice to that degree and cut. this cut is like the hip or valley rafter on a roof. If it was a floor joist layed at 45 degrees then the mitre would be 45 degrees. Hope I make sense to ya (a teacher Im not, but a framer I was )

regards
Al

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Paul in Mich

10-12-2003 06:35:04




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 Re: Mitre cutting crown molding for corner cabinet in reply to Bill in TN, 10-11-2003 14:08:42  
First of all, you need to have matching trim from the same company. If it is close, you can use unmatched pieces in interrupted places, but not to fit against eachother. Next, whatever the angle of the adjoining walls, the angle of your cuts will be half the wall angle, ie 45 degrees for a 90 degree corner, and 22 1/2 for a 45 degree wall. I always liked coped fits at inside corners. To do this, you run the first piece (usually the longer piece) straight to the wall, then saw opposite the next piece to what you would want, and cope the angle, creating a back relief. then fit your outside angles. You are working upside down on your mitre saw, so cut from the opposite side from which it would be on the cieling. It is always a good idea to mark how you want your angle to go, cut the piece long, do a trial fit to make sure you cut it in the right direction, then cut to fit. When you don't do it for a living, it is always on the job training, so don't think you have to work as fast as a pro. You can wear your legs out on a ladder, but when you finish, you'll get great satisfaction for all your frustrations.

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Mac

10-11-2003 15:59:58




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 Re: Mitre cutting crown molding for corner cabinet in reply to Bill in TN, 10-11-2003 14:08:42  
Slower, but I used to trace the outline onto the adjoining pc and use a fine tooth coping saw. Exact fit every time.



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Sam#3

10-11-2003 15:08:12




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 Re: Mitre cutting crown molding for corner cabinet in reply to Bill in TN, 10-11-2003 14:08:42  
Not sure I fully understand the problem but one thing the TV dribbles(ie: ex-spurts)always explain when you mitre crown molding you must invert it in the mitre box. That is set the top of the molding on the base and 'wall side' to the fence.



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bob

10-11-2003 18:01:24




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 Re: Re: Mitre cutting crown molding for corner cab in reply to Sam#3, 10-11-2003 15:08:12  
sam is right but you would have to experment. I agree you will never get right if sizes are not the same bob



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rick

10-11-2003 14:18:37




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 Re: Mitre cutting crown molding for corner cabinet in reply to Bill in TN, 10-11-2003 14:08:42  
I think you are saying you have cabinet in the corner that is at 45 degrees. If so you need to cut all your pieces of trim at that point at 22 1/2 degrees.



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Bill in TN

10-11-2003 14:45:06




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 Re: Re: Mitre cutting crown molding for corner cab in reply to rick, 10-11-2003 14:18:37  
Yes, the corner cabinet is at 45 degrees to the other wall cabinets. You say cut all the trim to 22 and a half. Does that mean cut the pieces that are now 90 to 22 as well as the corner piece?

Cut the 90 trim 22 and a half from the front to the left or from the front to the right?



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Bill in TN

10-11-2003 15:11:26




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 Re: Re: Re: Mitre cutting crown molding for corner in reply to Bill in TN, 10-11-2003 14:45:06  
Rick is correct 22 and a half....however, the crown that I got at a discount shop for almost nothing is different widths.....I mean, the back of the crown measures 2 3/4th on one board and 2 and 1/4th on the other.....it ain't never gona work..... and I thought I was loosing my mind....Thanks guys....



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