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Forum topic by jarheaddoc posted 05-16-2022 07:49 PM 454 views 0 times favorited 4 replies Add to Favorites Watch
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jarheaddoc

10 posts in 1498 days


05-16-2022 07:49 PM

I am looking for ideas on how to build a coping sled. I make angled cope cuts on arches and consistently tear off the point of the radius (where the rail and stile come together).

It’s not just the angle that I have trouble with, the piece is also wide, like 8 inches rough, and it doesn’t seem like commercially available jigs are set up to handle that width.

I would like to use either phenolic or aluminum for the base.

Thanks for your input.


4 replies so far

View Lazyman's profile

Lazyman

9779 posts in 2881 days


#1 posted 05-16-2022 10:55 PM

You mean like the arched stile on the top of a raised panel door?

Maybe start with how you are doing it now will get some ideas for how to deal with the tear out.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

View pottz's profile

pottz

26560 posts in 2478 days


#2 posted 05-17-2022 12:41 AM

im sure you can make one.i agree about the sleds,i have the wopodpeckers sled,it’s well made and works great but wont except wood that wide.mine will go to 5-1/2”.use that as a model and just make a bigger one.

-- working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

View Eric's profile

Eric

5763 posts in 1367 days


#3 posted 05-17-2022 12:48 AM

If you are building frame an panel doors, what about purchasing a router bit set designed for them. They will handle the arched top also. You would also need a backer block to eliminate the tearout at the end of the cross grain cut.

-- Eric, building the dream. the "Loft"

View Rich's profile

Rich

8289 posts in 2083 days


#4 posted 05-17-2022 01:15 AM

I had to build one for coping rails on residential doors, which can be up to 11 inches or so. All you need is a solid base like 1/2” MDF, a fence that’s square to the edge and a couple of toggle clamps for holding down the work.

The key is to keep the rail square to the cut and there are numerous ways to accomplish that. In a pinch, I’ve even used a square piece of 3/4” MDF as a guide.

-- Half of what we read or hear about finishing is right. We just don’t know which half! — Bob Flexner

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