Join Date: Jun 2020
Location: Batavia IL (West Chicago Burb)
I built a small barn at my last house using mortise and tenons. All hand cut. Im far from expert on the subject, but I spent a summer doing it, so got pretty good at it.
With hand work on through tennons, I found that working from both sides is the best appoach.
Do your layout on both sides refferencing the same face for the layout.
Drill a hole on each end of the mortise 1/2 way through, if the mortise is larger, drill a 3rd or forth hole as need to hog out in between the 2 side holes.
Flip the work and repeat. The key is to keep the drill as true as possible while drilling.
Then clean up with the chissel, or in this case the multi-tool.
I did the drilling with a bit brace and forsner type bit with a threaded feed screw tip, so keeping square was easy since you can just stop and change the bit brace angle if needed.
If you need to make a bunch quickly, look into a mortising chain saw. Thats how many of the heavy timber work is done now days.
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