Round tenons?

[steven c newman]

Maybe this will work?
E.C. Stearns, standing up.JPG
Yes, this sits in a 10" sweep brace of mine...was too hard to "pose" for the camera with the brace still attached...
E.C.Stearns, bottom view.JPG
Says it is adjustable from 1/4" out to 1-1/4" cut....Chair rungs, maybe?
E.C.Stearns, laying down.JPG
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..
A Square Hole, Dry Fit .JPG
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.

Check Gauge.jpg

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.

Spoke Pointer for the Start.jpg

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.

Centered Cone.jpg

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.

Hollow Auger Cuts Tenon.jpg

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

The Hollow Auger Depth Gauge.jpg

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

Work in Progress.jpg

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

jtk