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Forum topic by mds2 posted 04-16-2013 01:46 AM 914 views 0 times favorited 6 replies Add to Favorites Watch
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310 posts in 2119 days

04-16-2013 01:46 AM

Here is a joinery question for everyone. I need to make a tapered through mortise in a piece of 3/4 walnut. The tapered mortise is also at a skew; the tenon piece is at an angle to the walnut mortise piece. Also none of the sides of the mortise are straight, think of the cross section as a trapezoid with all sides arcing out. A puffy trapezoid.

Additional to this, the tenon is also curved. Also the face with mortise will be arched. The size of the tenon is roughly 2”x2”

I’ve thought about this a little bit for the last couple nights. Right now I’m thinking hog most of the material out with a drill and file to fit. File. Test fit. File. Test fit. File. Test fit…

6 replies so far

View a1Jim's profile


117276 posts in 3752 days

#1 posted 04-16-2013 01:51 AM

Sounds interesting . I would make the tenon first and follow your plan.

-- wood crafting & woodworking classes

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#2 posted 04-16-2013 01:54 AM

When you get this done, we would ALL like to see it! Me, I think I’d nail it together. :)


-- Always remember: It is a mathematical certainty that half the people in this country are below average in intelligence!

View mds2's profile


310 posts in 2119 days

#3 posted 04-16-2013 01:55 AM

Ah yes, I should mention the the tenon is already made. Think of it as a giant fang, because that is what it looks like.

View Loren's profile


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#4 posted 04-16-2013 02:13 AM


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#5 posted 04-16-2013 03:30 AM

Well I was ready to say drill it out in steps with diminishing size bits then I read “curved”. I think you’ve made it too easy, it should also corkscrew <g>. Good luck and I want to see lots of pics.

-- Rick M,

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310 posts in 2119 days

#6 posted 04-17-2013 01:45 AM

Here is the second attempt. Pretty sloppy and the other side is much worse. This isnt the final shape of the maple piece but I thought I’d practice. I’ve done about all the shaping I can with that plane in the background. My spokeshave should come in the mail tomorrow and I am very excited to use it! Though I imagine I will have a lot of tearout in this maple. I ended up just chopping out a mortice and using a rasp to fit. I keep having problems in the corners where the rasp tends catch and cut too deep. I actually had a blowout on the other side of the top hence why I’m not showing it. I need to be more diligent.

There is another piece that will be above this one. It intersects the “tooth” in a similar manner, just at an upward angle. I’ve decided I’m going to bend them after I fit them. Maybe.

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