Machinist Calculator (MC-20).

A Machinist Calculator is a hand-held calculator programmed with built-in formulas making it easy and quick for machinists to establish speeds, feeds and time without guesswork or conversion charts. Formulas may include revolutions per minute (RPM), surface feet per minute (SFM), inches per minute (IPM), feed per tooth (FPT). A cut time (CT) function takes the user through a calculation step-by-step. Other features may include a metric-English conversion function, a stop_watch/timer function and a standard math calculator. A modern basic arithmetic calculator For other uses, see Calculator (disambiguation). ... A machinist is a tradesperson who specializes in making things out of metal or other solid material. ... Revolutions per minute (abbreviated rpm, RPM, r/min, or min-1) is a unit of frequency, commonly used to measure rotational speed, in particular in the case of rotation around a fixed axis. ... The International System of Units (symbol: SI) (for the French phrase Syst me International dUnit s) is the most widely used system of units. ...

This type of calculator is useful for machinists, programmers, inspectors, estimators, supervisors, and students. A programmer or software developer is someone who programs computers, i. ... Inspector is a rank in many police forces. ... It has been suggested that this article or section be merged with estimation theory. ...

See also

Computer numerical control (CNC) The acronym CNC stands for Computer(ized) Numerical(ly) Control(led), and refers specifically to the computer control of machine tools for the purpose of (repeatedly) manufacturing complex parts in metal as well as other materials, using a program written in a notation conforming to the EIA-274-D standard...