diffusion coating
Any process whereby a basis metal or alloy is either coated with another metal or alloy and heated to a sufficient temperature in a suitabl…
Browse
Glossary Terms
disc grinding
Operation in which the workpiece is placed against the side of a wheel rather than the wheel’s periphery. See grinding.
disc-cutting attachment
Adjustable device for a contour bandsaw that positions stock to allow the sawing of arcs and circular shapes on a contour bandsaw.
dish
Form of relief given to the face of an endmill to prevent undesirable contact with the work. Similar to clearance.
dividing head
Attaches to a milling-machine table and precisely indexes the workpiece. Allows equally spaced cuts to be made when machining gear and spro…
direct numerical control (DNC)
Method of transferring CNC code from the CAD/CAM system to the machine tool.
dovetail cutter
Cutter for milling dovetail slots. See milling cutter.
dressing
Removal of undesirable materials from “loaded” grinding wheels using a single- or multi-point diamond or other tool. The process also expos…
drill jig
Accessory that holds a workpiece securely while guiding a drill or other tool into the workpiece. Ensures accurate, repeatable location.
drilling tool (drill or drill bit)
End-cutting tool for drilling. Tool has shank, body and angled face with cutting edges that drill the hole. Drills range in size from “micr…
drill-grinding gage
Used to check a drill’s entry angle into a workpiece. Also used to check accuracy when grinding drills.
drilling
Operation in which a rotating tool is used to create a round hole in a workpiece. Drilling is normally the first step in machining operatio…