The router is one of the most versatile tools in the shop, but with the right jigs, it becomes a precision joinery machine. In this Woodsmith Shop episode, the team builds and demonstrates two clever, shop-made router jigs that solve common woodworking challenges: fitting flawless miters and cutting accurate tenons of almost any length.
These projects are designed to be easy to build, simple to use, and incredibly effective. Whether you’re working on frames, furniture, or cabinet parts, these router jigs help you work faster while improving accuracy and repeatability.
Miter Trimmer for Perfect-Fitting Joints
Getting a miter joint to fit perfectly sounds straightforward. Cut both pieces at 45 degrees and bring them together. In reality, even the smallest error can leave gaps that distract from an otherwise great project. That’s where the router miter trimmer shines.
This jig pairs with a handheld router to fine-tune miter joints quickly and cleanly. Instead of fussing with repeated saw cuts, you trim the joint with a router, producing a smooth, accurate surface every time. The jig accepts stock up to 3 inches wide, making it useful for more than just picture frames.
One of the standout features of this miter trimmer is its adjustability. You can slightly increase or decrease the trimming angle to dial in a perfect fit for each joint. That flexibility makes it easy to correct small errors and achieve tight, gap-free corners with confidence.
Best of all, the jig is compact and portable. It’s just as useful at the bench as it is on a job site, and it’s simple enough to build in a short amount of shop time.
Tenoning Jig for Long or Short Workpieces
Cutting tenons on long rails can be awkward and frustrating, especially at the table saw. Long pieces are hard to support, tend to twist, and often require makeshift setups just to feel safe. This router tenoning jig takes a different approach.
Instead of moving the workpiece, this jig holds it securely in place while the router is guided along a fence. The result is controlled, accurate cuts without worrying about tipping or losing alignment. Because the workpiece stays fixed, there’s effectively no limit to the length of stock you can rout.
The jig is designed to handle both parts of a tenon. To cut the cheeks, the workpiece lies flat in the top section of the jig. For the edge cuts, the workpiece is positioned against the side. In both setups, the router does the work while the jig ensures consistency.
This design accommodates stock up to 5-3/4 inches wide, making it just as useful for small parts as it is for long rails. With quick setup and reliable results, it’s a jig you’ll reach for again and again.
Why These Router Jigs Belong in Your Shop
Together, these two jigs unlock capabilities many woodworkers don’t realize their router already has. They allow you to tackle essential joinery tasks with greater accuracy, less frustration, and improved safety.
Both jigs are built from straightforward materials, rely on simple construction techniques, and are designed to deliver professional-quality results. They’re ideal projects for any woodworker looking to expand their shop-made tool collection while sharpening their skills.
Get the Plans and Build Your Own
Step-by-step plans are available that walk you through building both the Miter Trimming Jig and the Tenoning Jig, complete with measured drawings, material lists, and setup tips at WoodsmitPlans.com. Once built, these jigs will pay off every time you need tight miters or clean, consistent tenons.
Whether you’re dialing in frame corners or cutting joinery for furniture, these router jigs help you work smarter — and get better results — with tools you already own.
