Groove (joinery)

Types and characteristics

Grooves are commonly classified by whether they extend to an edge. A through groove passes completely from one end of the piece to the other so its ends are open; a stopped (or blind) groove terminates within the surface so the ends do not reach an edge. Grooves vary in width, depth, and placement: they are dimensioned to accept the mating part with enough clearance for seasonal movement but not so loose that the joint becomes weak or visible.

Tools and techniques

Historically grooves were cut by hand with specialized planes (plough or plow planes) and chisels. Today they are often produced with powered tools: a router and appropriate bit, a table saw equipped with dado blades, or a spindle moulder. Fine adjustments and cleaning are frequently done with a router plane or chisel. Typical practice controls depth and squareness so the mating panel sits flush and moves as intended within the groove.

Uses and examples

Grooves serve many functions in furniture and cabinet work. They house panels in frame-and-panel doors, seat the bottoms of drawers and cabinets, form tracks for sliding doors, and form part of tongue-and-groove flooring and exterior cladding systems. In cabinetmaking and joinery tasks they are standard solutions; see general cabinetmaking references at cabinet making and broader woodworking resources. Drawer construction specifically often uses grooves for drawer bottoms.

Distinctions and notable points

Grooves are distinct from dados (which cut across the grain) and rabbets (which are edge recesses). They can be part of more complex joints such as tongue-and-groove connections, where a tongue on one member fits into a groove on the other. Good practice accounts for wood movement: panels are usually floating inside grooves to avoid splitting, and stopped grooves are used when continuity of a surface is desired.

Practical considerations

When planning grooves woodworkers consider fit tolerance, tool marks, and ease of assembly. Router bits and blades should match groove dimensions closely, and test cuts on scrap stock help ensure correct depth and fit. Whether made by hand or machine, a well-executed groove is a simple but essential element of sound joinery.