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Help cutting cove molding for bookcase

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Forum topic by deadherring posted 04-18-2021 11:42 PM 293 views 0 times favorited 9 replies Add to Favorites Watch
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deadherring

106 posts in 2725 days


04-18-2021 11:42 PM

Hi folks,

I need some help cutting cove molding for a bookcase.

Here’s what the plans are calling for:

According to the research I did online, you are supposed the cut the molding on opposite ends of the miter saw at a 45 and it should fit together.

This is how I made the first cut and then swung the saw to the opposite 45.

But, this is what I end up with:

This is the same side of the miter:

What am I missing?

I’m afraid to make any more cuts and run out of material.

Thanks,

Nathan


9 replies so far

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Mosquito

11106 posts in 3374 days


#1 posted 04-19-2021 12:41 AM

It’s really hard to tell from the pictures (sideways pictures of a case on its side lol)

It’s kind of hard to see, but are you cutting it with the cove profile down? If so, that’s your issue. Since this isn’t crown molding, the part that goes against the book case should be against the fence of the miter saw. The top of the molding should be on the table of the miter saw.

You can hold the molding on the book case the way it should be installed, make your mark for where you need to cut it, and then take a speed square (or any other 45° marking tool) and lay out the line to cut. This will help you visualize which way the miter saw blade should be, and which way the piece should be.

-- Mos - Twin Cities, MN - http://www.youtube.com/MosquitoMods - http://www.TheModsquito.com

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Mosquito

11106 posts in 3374 days


#2 posted 04-19-2021 12:57 AM

I added a half round for the front face of the top edge of it, just to make it a little easier to see top vs bottom in the images.

The top of the molding is on the miter saw bed, the back is against the fence (so it’s upside down)
With the blade at 45° going to the right, the keeper for the right side of the book case (as you’re looking at the book case) would be on the left side of the blade (A)

Then switch the miter saw to be 45° going to the left. The keeper for the front of the book case, will be on the right side of the blade (B)

 

Then flip them over so the top is up, and you should be all set.

-- Mos - Twin Cities, MN - http://www.youtube.com/MosquitoMods - http://www.TheModsquito.com

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SMP

3975 posts in 987 days


#3 posted 04-19-2021 01:05 AM


You can hold the molding on the book case the way it should be installed, make your mark for where you need to cut it, and then take a speed square (or any other 45° marking tool) and lay out the line to cut. This will help you visualize which way the miter saw blade should be, and which way the piece should be.

- Mosquito

Yes, this info is gold. I’ve done this molding tons of times and still screw up when I get “too comfortable “ and end up wasting expensive molding. The pencil lines make it very easy to see before messing up a cut

I know this isnt crown but one of the things I like about the Kreg crown molding jig is the instructions are fool proof.

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1thumb

388 posts in 3238 days


#4 posted 04-19-2021 01:49 AM

If you’re cutting it flat, must compound. If cove crown, I believe its 30/30 miter and bevel. Flat is the best way.

-- I actually have two thumbs and they oppose.

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deadherring

106 posts in 2725 days


#5 posted 04-19-2021 05:48 PM

Thanks all! I’ll give that a shot!

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Mosquito

11106 posts in 3374 days


#6 posted 04-19-2021 06:29 PM



Flat is the best way.

- 1thumb

Personally I would disagree with that. I’d rather deal with 1 angle, and I’d rather be cutting in to the profile than out of half of it.

But at the end, it comes down to whatever the person making the cuts understands and can make work for the results they want. Options are options, and we’re all better for it

-- Mos - Twin Cities, MN - http://www.youtube.com/MosquitoMods - http://www.TheModsquito.com

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Axis39

482 posts in 678 days


#7 posted 04-19-2021 11:35 PM

Upside down and backwards… Just like Mosquito showed. That’s the way I’ve always cut crown. And I’ve cut miles upon miles of it.

Well, okay 98% of the time that’s the way I’ve cut it. I’ve run into a few crowns that were too tall for my 8 1/2” sliding compound miter. The it’s flat and multi-angle time.

But, short crown like that? Man, that’s a no brainer. Upside down and backwards.

-- John F. SoCal transplant, chewer uppper of good wood

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1thumb

388 posts in 3238 days


#8 posted 04-19-2021 11:47 PM


Upside down and backwards… Just like Mosquito showed. That s the way I ve always cut crown. And I ve cut miles upon miles of it.

- Axis39

Flat and on a compound. That’s the way I’ve always cut crown. And I’ve cut and installed miles of it. Corners are much nicer. It’s a no brainer.

-- I actually have two thumbs and they oppose.

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Foghorn

1212 posts in 468 days


#9 posted 04-20-2021 12:06 AM


Upside down and backwards… Just like Mosquito showed. That s the way I ve always cut crown. And I ve cut miles upon miles of it.

- Axis39

Flat and on a compound. That s the way I ve always cut crown. And I ve cut and installed miles of it. Corners are much nicer. It s a no brainer.

- 1thumb


Thanks for the lessons all. There may be someone who comes along though and emphatically claims that miter saws are for rough carpenty! :)

-- Darrel

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