Chamfering the Exposed Tenon End
Some furniture styles (especially Arts & Crafts) like to show through tenons – not only are they “through” but often protruding slightly. Then they are chamfered around the outer edge.
Below is an example using my Tool Case. The handle tenon protrudes right through the side and also the buttress. The exposed length is 3/16-in. This tenon needs to be trimmed with a 1/8-in. chamfer.
There are many ways to do the chamfering in SketchUp, including use of a plug-in. Within the standard SketchUp Tools, you could use Follow Me or even the Scale Tool. I’ll show a way using Push/Pull, Line, and Move/Copy.
Step 1: Use the Push/Pull Tool to push the end of the tenon back 1/8-in. The tenon protruded 3/16-in. and I want to end up with a 1/8-in. chamfer.
Step 2: Select the Offset Tool, one that I don’t use very often. Click on the outer edge of the tenon and move the mouse toward the center. Type 1/8 for an offset exactly at 1/8-in.
Step 3: Select the Line Tool and draw four lines to connect the corners. This will allow the auto-fold feature in SketchUp to get us a chamfer.
Step 4: With the Select Tool, click on the inner rectangle face. Then choose the Move/Copy Tool, click on the selected face and pull the inner rectangle outward. In this case I will hold the movement on the red axis (by tapping the Right Arrow key) as that is the orientation of my Tool Case Handle. Type 1/8 and hit Enter to get an exact lift on the face. Notice how the top of the tenon begins to fold as you move the mouse.
I would copy this chamfer and move it to the other end of the Handle. Then I would flip it along the red axis and connect precisely to the other tenon end. After erasing the waste, you will uncover a perfect chamfered tenon.
This seems to be an easy way for me, but I’m sure there are a lot of alternatives.