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Dado
A three-sided trench cut across the grain of a board.
Dado Head (or Cutter)
System of individual saw blades that are stacked to create dadoes of specific sizes; used in a table saw or radial arm saw
Danish Oil
A type of penetrating wood finish, generally either clear or with a darker tint
Dead-Blow Mallet
Striking tool with loose lead shot contained within its head to concentrate all its energy into a single, nonbouncing blow, and a soft face to prevent marring the workpiece
Deadman or Bench Jack
A bench accessory that assists with supporting long boards that are clamped in the workbench’s face vise. The accessory, usually called a deadman, slides on a track parallel to the front edge of the workbench and it is drilled with a series of holes that accept pegs. The pegs can be moved up or down to support boards of various widths. And the deadman can be slid to accomodate different lengths.
Deck Screw
A coarse-threaded wood fastener, similar to a drywall screw but with a thicker, less brittle shaft
Denatured Alcohol
Clear, colorless liquid used as a cleaner and solvent, as well as a fast-drying vehicle for finishes such as shellac
Dentil
One of a series of small, rectangular blocks forming a molding, especially under a cornice
Dimensional Lumber
Wood building material cut to standard sizes, both in width and thickness, such as a 2 x 4, and sold in various lengths
Disc Sander
A powered surfacing tool, either handheld or stationary, that operates by spinning a circular abrasive disc
Dog
An object that holds a workpiece stationary by friction rather than by clamping (commonly referred to as “bench dogs”).
Domino
A fastener used to join two surfaces that involves a mortise and loose tenon. Dominoes require a dedicated power tool for the mortises and, most often, mass produced tenons in various sizes for various applications.
Dovetail
Attractive and very strong joint formed by mating one or more angled, fan-shaped "pins" to correspondingly sized and shaped notches, called "tails." The joinery can be visible from both sides (through), from only one side (half blind), or invisible (blind).
Dowel or Doweling
A cylindrical length of wood used for making joints by inserting a length into two corresponding holes and gluing with clamp pressure. Often used as a pin to reinforce a joint
Doweled Joint
Dowels add strength and alignment benefits to what is normally considered a weak joint.
Doweling Jig
Any number of commercially available devices to assist with placing and drilling of dowel hole.
Downdraft Table
A flat, perforated surface attached to a vacuum source used to remove dust during sanding
Drawbore or Drawboring
The act of pulling the two components of a mortise-and-tenon joint together using a peg and two offset holes. The hole in the mortise is in a slightly different location than the hole through the tenon. When you drive a peg through the two holes it pulls the tenon into the mortise, creating a locked mechanical joint. Drawboring is still widely used in timber framing, though it has fallen out of favor in furniture making.
Drawknife
A blade with a handle at each end used for shaving surfaces
Dressed
Planed smooth during the finishing process
Drill Press
A drill head and motor mounted on a vertical column aligned with an adjustable worktable mounted on the same column
Driver Bit
A screwdriver tip that is installed in a drill in place of a drill bit to facilitate powered screw driving
Drum Sander
Surfacing machine consisting of a spinning cylinder wrapped with a flexible abrasive sheet. Machines with smaller vertical cylinders are used for sanding curved surfaces and contours; machines with larger horizontal cylinders, sometimes called wide-belt sanders, are generally equipped with a conveyor belt and are often used to size pieces and panels to precise thickness.
Dry Fit
To test-fit components without glue or fasteners
Drywall Screw
Coarse-threaded wood fastener commonly used as an all-purpose wood screw, similar to a deck screw but with a thinner, more brittle shaft
Dust Collector
A system of ducts and hoses connected to a vacuum device for the removal of sawdust, wood chips, and other debris generated during woodworking operations
Dust Port
An accessory attached to a power tool to connect it to a dust collection system
Dwang
A short horizontal piece of timber fixed between floor/ceiling joists or uprights on a stud partition to stiffen structure.
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