Jig for Router Dadoes
This workshop tip was submitted by Eliot Ehrich, Chatham, N.J.
For fast and accurate dadoes, this jig is hard to
beat. The trick is to run the router against one
guide, then back against the other. This allows you to
use a 1⁄2-in. bit, for example, to cut a dado that’s 13⁄16-in.
wide or less, to get a perfect fit with plywood. Because the
dado is cut in the end of the jig, you can simply line up the jig
with one mark. This makes it hard to goof up by having the dado
on the wrong side of the mark. For greatest accuracy, make a dedicated
jig to fit one router and one bit. Note: The jig will only cut
one size dado.
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