How to Use a Router Inlay Kit: Step-by-Step Wood Inlay Guide
Decorative wood inlays have been a hallmark of fine furniture making for centuries. Traditionally, these details required careful handwork, with each inlay painstakingly shaped to fit a matching recess cut with chisels and carving tools.
Today, there's an easier way to add the same kind of craftsmanship to your woodworking projects. With a plunge router and a router inlay kit, you can create precisely fitted decorative inlays using a simple template.
The secret is a specially designed guide bushing with a removable sleeve. This allows you to rout both the recess and the matching inlay piece using the same template.
Once you understand how the system works, you can add contrasting wood details to boxes, cabinet doors, tabletops, and other furniture projects.
What's Included in a Router Inlay Kit?
A router inlay kit is designed to make two matching cuts: a recess in the project and a separate piece of wood that fits into it.
The kit uses a guide bushing mounted in the router's baseplate, along with a removable sleeve that changes the effective diameter of the bushing.
A typical kit includes:
- Guide bushing and locking ring: Attach to the router's baseplate and follow the template.
- Removable sleeve: Fits over the guide bushing to change the offset between the template and router bit.
- 1/8" downcut spiral router bit: Cuts clean edges around the inlay and recess.
- Centering pin: Aligns the guide bushing with the router's collet for consistent results.
How the Removable Sleeve Works
The removable sleeve is what makes this system so useful.
With the sleeve installed, the guide bushing follows the template while the router bit cuts the recess slightly inside the template opening.
When you remove the sleeve, the smaller guide bushing allows the bit to cut closer to the template edge.
This difference in offset compensates for the width of the router bit, producing a matching inlay piece.
The result is a recess and inlay that fit together without requiring two separate templates.
Choosing or Making a Router Inlay Template
You can purchase ready-made acrylic templates for common inlay shapes, including bowties and other decorative patterns.
But making your own templates gives you more freedom to create custom designs.
I like to use 1/4"-thick hardboard or MDF for shop-made inlay templates. Both materials are inexpensive, easy to shape, and provide a smooth edge for the guide bushing to follow.
The process is much like making any other router template. Lay out the design, cut the opening, and carefully smooth the edges.
One important detail is that the template opening will be larger than the finished inlay.
That's because the guide bushing and removable sleeve create an offset between the template and the router bit.
Use Centerlines for Accurate Layout
When making decorative inlays, positioning is just as important as cutting.
I like to draw centerlines on the template and corresponding layout lines on the workpiece.
These reference marks make it easy to align the template accurately before routing.
You can also use the same template repeatedly to create larger decorative patterns.
By carefully repositioning the template and aligning the centerlines, it's possible to build complex designs from a series of simple inlays.
Set Up Your Router Inlay Kit
Before you start routing, take a few minutes to set up the router correctly.
A plunge router is especially useful because it allows you to lower the bit into the workpiece while keeping the router base flat against the template.
Center the Guide Bushing
The first step is to make sure the guide bushing is centered on the router's collet.
Install the centering pin in the collet and loosely attach the guide bushing to the router's baseplate.
Lower the centering pin into the bushing opening. This aligns the bushing concentrically with the collet.
Now tighten the locking ring to secure the bushing.
Remove the centering pin and install the 1/8" downcut spiral bit.
This centering step is important. If the bushing isn't centered, the distance between the bit and template can change as you rotate the router, creating small gaps between the finished inlay and recess.
Position and Secure the Template
Next, mark the location of the inlay on your workpiece.
Align the template's centerlines with the layout marks and secure it using suitable double-sided tape.
Make sure the template is firmly attached and cannot shift while routing.
With the router set up and the template in place, you're ready to cut the inlay.
How to Make a Wood Inlay with a Router: 5 Steps
The routing process has two main parts: cutting the recess in the project and shaping the matching inlay from contrasting wood.
The following five steps show how the process works.
Step 1: Rout the Inlay Outline
Start with the removable sleeve installed on the guide bushing.
Set the router bit to cut a recess approximately 1/8" deep, as shown in the original technique.
With the template securely attached to the workpiece, lower the bit into the opening.
Guide the router around the inside perimeter of the template, keeping the bushing firmly against the edge as you change directions.
This establishes the outline of the recess.
Step 2: Remove the Waste from the Recess
Once you've routed the outline, carefully move the router across the inside of the recess to remove the remaining waste.
Use overlapping passes to produce a smooth, flat bottom.
Keep the router base supported on the template and workpiece throughout the operation.
When you're finished, the recess should have clean edges and a uniform depth.
Step 3: Rout the Matching Inlay Piece
Now it's time to make the inlay itself.
Choose a piece of contrasting wood with an attractive grain pattern.
Position the template over the blank to find the grain orientation you want, then secure it with double-sided tape.
Remove the sleeve from the guide bushing, leaving the smaller bushing in place.
With the router base flat against the template, carefully plunge the bit into the workpiece and rout counterclockwise around the template opening, as shown in the original procedure.
Keep the guide bushing against the template throughout the cut.
A plunge router makes starting this operation easier because you can lower the bit into the material without tipping the router.
Once the outline is complete, raise the bit clear of the wood before moving the router away.
Step 4: Free the Inlay at the Band Saw
After routing the outline, the inlay piece is still attached to the larger blank.
To separate it, take the blank to the band saw and resaw the inlay free.
The finished inlay should be slightly thicker than the 1/8"-deep recess.
This extra thickness allows you to level the inlay flush with the surrounding surface after gluing.
Step 5: Refine the Fit
Before applying glue, test the inlay in its recess.
Because the router bit is round, the inside corners of the recess will be slightly rounded. The outside corners of the inlay, however, will be sharp.
There are two ways to correct this.
You can lightly sand the corners of the inlay to match the recess, or use a sharp chisel to square the corners of the recess.
Whichever method you choose, remove only a small amount of material at a time.
Check the fit frequently until the inlay slips into the recess without forcing it.
Glue and Finish the Wood Inlay
Once you're satisfied with the fit, you're ready to glue the inlay in place.
Apply glue to the recess, making sure to coat the sides as well as the bottom.
Position the inlay and cover it with a waxed block of wood to protect the surface.
Gently tap the inlay into position, then clamp the assembly until the glue dries.
Afterward, use a scraper or sandpaper to level the inlay flush with the surrounding wood.
The result is a clean, decorative detail that looks like it required hours of painstaking handwork.
Tips for Better Router Inlays
A few simple practices can make the process more predictable.
Always center the guide bushing. Even a small alignment error can create visible gaps in the finished inlay.
Use a sharp downcut spiral bit. Clean edges make a noticeable difference when you're fitting contrasting wood pieces together.
Keep the template securely attached. Any movement during routing can spoil the fit.
Pay attention to grain direction. A clear or open template makes it easier to position the inlay for the most attractive grain pattern.
Test the fit before gluing. It's much easier to make small adjustments while the inlay is still loose.
Leave the inlay slightly proud. A little extra thickness makes it easier to level the finished surface without leaving the inlay below the surrounding wood.
Add Custom Details to Your Woodworking Projects
Decorative inlays are a great way to give an otherwise simple woodworking project a distinctive look.
And with a router inlay kit, the process is much easier than you might expect.
The removable guide bushing sleeve allows you to cut both the recess and the matching inlay using the same template, while the plunge router provides the control needed for clean, accurate cuts.
Once you've mastered the basic technique, try creating your own templates and combining simple shapes into more elaborate patterns.
With a little practice, you'll be adding custom wood inlays to boxes, cabinets, and furniture projects in no time.
More Router Template Techniques
A router inlay kit is just one way to put templates to work in your shop. With the right router bit and a well-made template, you can also shape identical furniture parts, cut precise recesses, and create matching curves.
Learn how to make your own templates from MDF, hardboard, or acrylic, and discover the differences between flush-trim bits, pattern bits, and router guide bushings.
LEARN MORE ABOUT ROUTER TEMPLATES → Making & Using Router Templates
