Appendix C: Glossary
- blotter
- a paper disk placed between grinding wheel and retaining flange, often marked with wheel type and speed rating
- boring
- a machining process that enlarges a round hole using a single point cutting tool
- chamfer
- usually a 45 degree angle machined on the start of a bore or a shaft to allow for ease of assembly
- computer numerical control (CNC)
- the control of a machine using coded instructions from a programmer or an operator
- conventional (machines)
- manually controlled machines
- counterbore
- enlarging the end of a previously created hole, usually to accept a Socket Head Cap Screw (SHCS)
- countersink
- creating a tapered hole on the end of an existing hole to accommodate a tapered head screw
- drill press
- a machine used to produce holes in workpieces; reaming, tapping, spot facing and countersinking can also be performed on drill presses
- grinder
- a machine that removes material from workpieces using abrasives
- heat treatment
- the heating and cooling of metals to modify their mechanical properties
- knurling
- using a tool to produce a pattern on the diameter of a workpiece in a lathe
- lathe
- a machine that holds and rotates the workpiece; a cutting tool is moved on ways to cut cylindrical, tapered or threaded features on a workpiece
- Machinery’s handbook
- a reference book used by the mechanical engineering disciplines such as engineers, tool and die makers and machinists
- mill
- a machine that holds the workpiece while a rotating cutter with single or multiple cutting edges cut surfaces and contours
- saw
- a machine used to cut material using a multi-tooth blade
- spot facing
- a machining operation that creates a flat surface at 90° to a hole
- tapping
- creating internal threads using a cutting or forming tool called a tap