CNC Machine: Computer numeric control. A computer controlled machine for cutting and removing material. Typically consisting of two or more axis of movement.
Router: The tool that spins the bit in the CNC machine.
Bit: Tool that cuts material in a CNC machine by spinning.
Tool Head: The cutting end of the bit.
Shank: The non-cutting end of the bit. This is the portion that is held in the collet.
Collet: The clamping device that holds the bit in the router.
Upcut Bit: A bit that pulls the removed material up and away from the bit.
Downcut Bit: A bit that pushes the removed material down and away from the bit.
Straight Bit: The cutting surface is perpendicular to the cutting surface and flat.
Laser Cutter: A 2-axis cutting machine that uses a concentrated light to burn through material. The laser cutter is computer controlled.
Spindle: The rotating axis of the router in the CNC machine. This is where the collet and bit are fastened to.
Dust Collector: Vacuum device that collects waste material that is removed from the cutting surface as the CNC operates.
Spoil Board: The sacrificial backer that the cutting material is fastened to.