100 Mortising Jig

The Mortising Jig

This plan 100 mortising jig is the easiest way to create mortises in the ends or sides of rails and stiles. The jig was designed to make use of shop-made floating (loose) tenon joinery.

When mounted on your workbench it provides a stable accurate platform to rout your mortises on the ends of your rails for the floating tenons. Turn the jig around and now you can clamp your work piece horizontally and you are mortising the rest of your cross rails.

The jig is designed to work with a handheld router and your guide fence, making accurate mortises every time. 

Made to work with shop made tenons, just round over the appropriate width and thickness of material cut them to the required length and you have inexpensive floating tenons for strong M&T Joints.

NOTE: Fine Woodworking tested the strength of standard integral tenons and loose tenon joinery and found no difference in strength.

Enjoy your new practical mortising jig!

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062 Mortising Jig:

The Mortising Jig

This mortising jig was originally designed by a friend and local woodworker John Nephew. It has always been affectionately referred to as “John’s Jig” and has been built and used by the majority of the woodworking night school students for the past eight years.

We have made a few minor changes over the years and are very satisfied with the end results. It is a very practical tool that make mortising with a hand held router easy and quick. Simple to build, easy to setup and even easier to use, it is one jig that you will be glad you built for your shop.

The work-piece stop blocks (shown in Paduk) are easy to remove for longer boards, but very handy when you want to make end mortises for loose tenon joinery.

Have fun building and using your new jig.
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