Where the router fits in furniture making
Furniture and cabinets are mostly built from flat panels and straight boards that join at right angles. A router is good at the repeating, accurate cuts that make those joints: a groove here, a stepped edge there, a shallow pocket for hardware. A handful of straight bits, a fence or edge guide and some clamps cover most of it.
This article looks at those joinery tasks in the context of whole projects. For a broader list of everything a router can do, including decorative edges and inlays, see the general overview; here the focus is casework and joints.
Dados for shelves and dividers
A dado is a channel cut across the grain that receives the end of a shelf or divider. It gives the shelf a ledge to sit on and keeps it from sliding, so it is a common choice for bookcases, cabinets and storage units. The joint itself is explained under dado joints.
The usual router method is:
- Mark the position of the shelf on both sides.
- Clamp a straight board as a guide, offset from the cut line by the distance between the edge of the router base and the bit.
- Rout the channel in one or more passes, moving the router along the guide.
- Test-fit the shelf and adjust if necessary.
A common frustration is that plywood is often a little thinner than its nominal size, so a bit of the “right” width may leave a sloppy fit. Many woodworkers measure the actual panel and use two passes, or a bit that matches it, instead of trusting the label. Plywood and other sheet goods vary, so measure yours.
Rabbets for backs, boxes and drawers
A rabbet is a step along the edge of a board. Routers cut them easily with a rabbeting bit (a bit with interchangeable bearings that set the depth of the step) or with a straight bit against a fence. Typical uses:
- recessing a thin back panel into a bookcase or cabinet so it sits flush
- joining the corners of a small box or drawer, where one piece steps into the other
- making a lip so a door or lid sits inside or over an opening
Because the bearing rides on the edge, the board has to be flat and clean. Rounded or damaged edges lead to inconsistent cuts.
Grooves for panels and drawer bottoms
Grooves run along the length of a board and hold a panel. They are used in frame-and-panel doors, cabinet sides and drawers. A fence-guided straight bit makes a consistent groove, and the groove depth is often set so the panel has room to float. This matters with solid wood, since wood movement with changes in humidity means a panel glued tight on all sides may crack or push the frame apart. Plywood moves much less.
Mortises and loose tenons
Some builders use a router to cut mortises, either freehand with a guide or with a jig. The traditional mortise and tenon can then be made by shaping a matching tenon. Another common approach is to cut matching mortises in both parts and join them with a separate loose tenon, which avoids shaping the tenon on the end of the board. These joints are strong and often used for tables, chairs and frames, but they depend on accurate setup, so practice on scrap first.
Joinery that benefits from jigs
With a good jig, a router can make box joints and dovetail joints. A jig fixes the geometry, so your skill goes into setup rather than hand sawing. The trade-off is that jigs are only as good as their adjustment, and the instructions that come with them vary. This is an intermediate step: start with dados and rabbets, and move to jig-based joinery when those feel routine.
Cabinet door and drawer details
Beyond joints, a router adds the details that make casework feel finished:
- roundover or chamfer on door edges and drawer fronts
- finger pulls cut into drawer fronts
- recesses for hinges, cut with a template or a straight bit and a careful depth stop
- slots for adjustable shelf pins, when guided by a template
Edge details are usually cut after assembly of the individual parts but before the final sanding and finishing, so the surface gets one clean pass.
Making cuts that fit
Several habits help across all these tasks:
- Test on scrap of the same material before you cut the real piece.
- Take shallow passes. Cutting deeper in stages tends to give cleaner walls and less strain on the router.
- Measure from the same reference face so errors do not stack up.
- Mind the grain. Where the bit exits an edge, tearout can occur; backing the cut with a scrap board or making a light scoring pass often helps.
- Check the bit. A dull or dirty bit burns the wood and can make a rough groove.
Safety notes
A router can grab a workpiece or move suddenly if it is not controlled.
- Wear eye and ear protection and a dust mask or respirator.
- Unplug the router, or remove the battery, before changing bits or depth.
- Clamp the workpiece securely, and keep both hands on the router.
- Feed in the correct direction for the setup; check your manual for the rule.
- Let the bit stop completely before you lift the router off the work.
- Support long panels so they cannot tip as you cut.
Outcomes depend on the router, the bit and the material, so treat all measurements here as starting points and verify with test cuts.