There are several ways to cut a rabbet, but when I want a clean, flat-bottom rabbet, I often turn to the router table. That's especially true when the finished joint will be visible.
The router table provides good support for the workpiece and makes it easy to control the width and depth of the cut. And with a few simple techniques, you can minimize chipout while creating a smooth, consistent rabbet.
Use the Router Table Fence
Whether you're using a straight bit or a rabbeting bit, the router table fence is an important part of the setup.
With a straight bit, the fence is required because it controls the width of the rabbet. But I like to use the fence even with a bearing-guided rabbeting bit.
The reason is control.
The fence supports the workpiece as it approaches the router bit and continues to provide a solid reference throughout the cut. That makes it easier to keep the workpiece moving smoothly and consistently.
Add a Featherboard for Consistent Depth
Using the fence also gives you another advantage: it provides a setup that works well with a featherboard.
A featherboard helps hold the workpiece firmly against the router table. This prevents it from riding up as it passes over the bit, which could leave you with a rabbet that varies in depth.
Depending on the workpiece and setup, a second featherboard can help keep the stock firmly against the fence as well.
With the workpiece supported, you can concentrate on maintaining a steady feed rate and keeping everything moving smoothly through the cut.
WOODSMITH TIP: Keep the Workpiece Flat. Consistent downward pressure is especially important when cutting rabbets. If the workpiece lifts as it passes over the router bit, the depth of the rabbet will change. A featherboard provides that pressure throughout the cut instead of relying entirely on your hands.
Cut the Rabbet in Multiple Passes
One of the most common rabbets runs along the edge of a workpiece. Here, one of the main concerns is chipout.
The solution is simple: don't try to remove all the waste at once.
Unless you're cutting a small rabbet — about 1⁄4" wide or less — rout it in several passes.
Start With a Light Scoring Cut
Begin with a shallow scoring pass that's about 1⁄16" wide.
This first cut establishes a clean edge for the rabbet and helps minimize chipout where the finished shoulder will be visible.
Remove the Waste
After establishing the shoulder, make several larger passes to remove the bulk of the waste.
These cuts don't need to leave the final finished surface, so they can remove more material. Keep each pass to no more than about 1⁄4".
Finish With Another Light Pass
Save a small amount of material for the final cut.
This last light pass cleans up the inside edge of the rabbet and leaves a smoother finished surface.
So rather than one heavy cut, think of the routing sequence as:
Score → Remove Waste → Finish
That little bit of patience can make a noticeable difference in the finished joint.
Use a Backer Board for End Rabbets
Routing a rabbet across the end of a narrow workpiece presents two problems.
First, the narrow end doesn't provide much surface against the router-table fence, making it difficult to keep the workpiece square to the bit.
Second, the unsupported trailing corner can chip as the router bit exits the cut. A simple backer board solves both problems.
Hold the backer board firmly against the workpiece as you make the cut. The extra width provides a larger bearing surface against the fence, helping guide the workpiece squarely past the bit.
At the same time, the backer supports the wood fibers at the trailing edge. Instead of breaking away as the router bit exits the workpiece, the fibers remain supported by the scrap.
The result is a cleaner end rabbet with much less chance of chipout.
Clean Rabbets Come From Controlled Cuts
The router table makes cutting rabbets straightforward, but good results still depend on controlling the workpiece and the amount of material you're asking the bit to remove.
Use the fence to provide a solid reference, add a featherboard to maintain consistent pressure, and rout larger rabbets in several passes. When working across the end of a narrow part, add a backer board for both support and chipout protection.
Those simple techniques make it much easier to produce smooth, consistent rabbets with crisp shoulders and clean edges.
Stop Router Table Tearout
Chipout isn't limited to rabbets. Grain direction, depth of cut, workpiece support, and router setup can all affect the quality of a routed edge. Check out our 5 Tips for Taming Router Table Tearout for more ways to prevent splintering and get cleaner results.
LEARN HOW TO PREVENT ROUTER TEAROUT → Get Cleaner Cuts and Crisper Edges
Build Your Own Router Table
Put these techniques to work with a shop-built router table designed for accurate, controlled routing.
GET THE ROUTER TABLE PLANS → Build a Just-Right Router Table
