How to Cut Dadoes and Rabbets on a Table Saw

Dadoes and rabbets have gotten complicated with all the dado stack debates, router versus table saw arguments, and advice about what depth-to-thickness ratio you need. Today, I will share it all with you.

The dado and the rabbet are probably the two most useful joints in furniture and cabinet construction after the simple butt joint, and they’re far stronger than butt joints for most applications. If you’re building shelving, casework, drawer boxes, or any kind of frame-and-panel construction, you’ll cut these joints constantly. Getting them right — fit that’s snug without requiring hammer persuasion — is a skill worth developing.

Understanding the Difference

A dado is a channel cut across the grain of a board. Think of the groove that holds a shelf in a bookcase side — that’s a dado. A rabbet is a notch along the edge or end of a board. Think of the stepped cut along the back edge of a cabinet side that accepts the back panel — that’s a rabbet. Both joints increase glue surface area and provide mechanical alignment, which is why they’re standard in cabinet construction.

Through dadoes run the full width of the board — visible on both edges. Stopped dadoes stop short of one or both edges, hiding the joint from the front of the piece. The stopped dado requires a bit more setup to locate the stop point, but the cleaner look in finished furniture is worth it.

The Dado Stack: The Right Tool for Production Work

A dado stack — a set of multiple saw blades and chippers that stack on the arbor to cut a wide groove in a single pass — is the right tool for cutting dadoes on a table saw. You set the width of the stack to match your material thickness, make a test cut, check the fit of a scrap of the mating piece, and adjust. When the fit is right, you run all your identical cuts from the same setup.

Depth is one-third the material thickness for a structural dado. A dado in 3/4-inch material should be about 1/4 inch deep. Deeper than that and you’re removing too much material from the structural member. Shallower and the joint doesn’t provide meaningful mechanical support. These numbers aren’t arbitrary — they represent tested proportions for solid wood and plywood.

Cutting a Rabbet on the Table Saw

A rabbet can be cut with two passes on the table saw using a standard blade, no dado stack required. First pass: stand the board on edge against the fence and cut the shoulder. Second pass: lay the board flat and cut the cheek. The intersection of the two cuts produces the rabbet. This two-pass method works, but the dado stack makes it a single-pass operation that’s faster and more consistent. I’m apparently someone who used the two-pass method for years because I didn’t want to spend time setting up the dado stack for a simple rabbet, but the stack method is faster once it’s set up.

Test Pieces: Never Skip This Step

The fit of the joint in scrap tells you whether to adjust the width, depth, or both before you commit your good material. A joint that’s tight in scrap can be eased; a joint that’s loose in scrap means you need to adjust the stack width. Scrap is cheap. Your good walnut is not.

Getting a Snug Fit

Target fit is hand-pressure snug — the mating piece slides in with firm hand pressure, no hammer, no play. If the joint requires a mallet, it’s too tight; glue won’t be distributed evenly and the joint will stress the surrounding wood. If there’s any rocking or side play, it’s too loose; the joint won’t provide alignment and structural benefit. Dial in the fit with scrap, then run the production cuts. Keep the test piece handy to re-check fit if the wood changes with humidity.

Applications Worth Knowing

Dadoes for shelf pins and fixed shelves in bookcases and cabinet carcasses. Rabbets for the back panel on any case piece — the 1/4-inch plywood back fits into a rabbet around the back edge of the sides, top, and bottom. Rabbets for drawer bottoms — the drawer bottom slides into a rabbet around the bottom inside edge of the drawer box. These three applications alone cover the majority of furniture and cabinet construction, and once you’re comfortable cutting them accurately, the quality of your work goes up noticeably.