Dimension planer. A wood-planing machine, for planing accurately to size.
Disk or disc. A cylinder whose length is very short in proportion to its diameter.
Dividers. A tool having two legs with sharp points at their ends for measuring distances or drawing circles.
Dog. A work holding device.
Dog-chuck. A chuck containing independent dogs or jaws.
Dog-head. A hammer used in plate or saw straightening.
Double-eye or knuckle-joint. A joint in which one piece is forked at its end, to receive the other, and a pin passes through both.
Double-thread. A screw thread, having two spirals in the same bolt or body.
Dovetail. A groove that is wider at the bottom than at the top, or a projection thicker at the top than at the bottom.
Draw-filing. That class of filing in which the line of file motion is in the direction of the width of the file.