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Tuesday, August 5, 2025

Steep Dovetail Corner Joint

 

Face to Face
This is a sample I made to show my Furniture Design students one way to connect wood at a steep corner.   A variation was used to connect the top of A-frame legs on a CNC controller cart the students made. The parts slide together, so technically this is more of a French Dovetail solution. 
Open for Inspection
Careful layout of vectors was require to guide the dovetail bit.  Each half had to be clamped at an angle so the bit could travel level through the ends. My compound angle clamping fixture was used for that task. 
One half slide down into the other
There is a taper to one side of the cuts to compensate for the wide top sliding down to the narrow base of the dovetail shape. This joint only slides together in one direction. 
Tails into Slots
Once together there is no play between the halves,  Snug tight.  This sample has been abused for inspection by students and is a bit worn.  A little glue and the dovetail interlocking would make a very strong steep corner joint. 
Snug Together
I am considering using this joint for the corners of a triangular mantel clock box frame.  With a shallow dovetail corner variation at the top of the triangle. 
All Stood Up
Ends were trimmed so when assembled the end would be flat across. At the top the dovetail pattern is evident and interesting. 

I realize this steep angle is a rare occurrence in projects.  Knowing this joint is possible and how to cut it though keeps it on my menu of options when designing furniture and accessories.  

Comments are encouraged. 

4D