How to Cut Finger Joints with a Router Jig
Finger joints are a great way to add strength and visual interest to woodworking projects. But getting the fingers sized and aligned perfectly can be a challenge, especially when you're working with custom widths or unusual spacing. This clever router jig makes the process easier, allowing you to cut accurate, perfectly fitting finger joints with a single setup.
A Versatile Finger Joint Jig for Your Router
Unlike traditional finger joint jigs that use fixed spacing, this design features adjustable indexing keys that slide along a T-track. The keys can be sized to match the fingers of your joint, making it easy to create custom patterns, including variable-width and tapered finger joints.
Best of all, the jig uses the same setup to cut both mating pieces. That helps ensure the fingers and slots line up accurately for a clean, tight-fitting joint.
Simple Construction, Precise Results
The jig is built from layers of 3/4" plywood with a hardboard backer. Adjustable keys lock into position with socket screws, providing the indexing needed for repeatable cuts.
All you need to put the jig to work is a handheld router equipped with a 1/2"-diameter pattern bit.
Create Custom Finger Joints for Your Next Project
Whether you're building boxes, drawers, or furniture, this jig offers the flexibility to create finger joints that suit your design. It's especially useful for decorative joinery where standard, evenly spaced fingers aren't quite what you have in mind.
Build Your Own Finger Joint Router Jig
Ready to make one for your shop? The downloadable Woodsmith plans include step-by-step instructions and detailed drawings to help you build the jig.
GET THE STEP-BY-STEP WOODWORKING PLANS → Build a Finger Joint Jig
