Round tenons?

[steven c newman]

Maybe this will work?
506911
Yes, this sits in a 10" sweep brace of mine...was too hard to "pose" for the camera with the brace still attached...
506912
Says it is adjustable from 1/4" out to 1-1/4" cut....Chair rungs, maybe?
506913
Scale on the depth stop goes out to 3" long tenon....Chair seats?

Picked up at a garage sale a few years ago for a dollar bill....

I suppose I could have used it here..
506914
Instead of hand chopping square holes...

[Jim Koepke]

Round tenons can be useful on many projects.

If a large batch is to be made it helps to start by making a check gauge.

506930

This was made with the forstner bit used for cutting the mortises. This is one of the few projects where my tenons were cut before the mortises. Though it is like dovetails, pins first vs tails first, many times it doesn't really matter.

It is especially handy to run a test piece to check the hollow auger if the blade ever needs to be removed for sharpening.

It is also helpful to start with a spoke pointer.

506932

At the start on a square piece the pointer will be thumping on the corners. When it starts making a continuous cut, it should be checked for centering and size.

506929

If while spinning the pointer you notice only two or three corners are thumping it is likely the pointer has drifted to one side. After having cut a few your alignment perception should kick in.

Finally the hollow auger cuts the tenon.

506931

My hollow auger was missing it's depth stop when purchased. So far other ways of setting the depth haves worked for me.

506933

For this project part of the casting was the same as the planned length of the tenon, so it was the gauge.

506934

This procedure helps when making a lot of round M&T joints.

jtk