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A line drawing showing some basic concepts of speeds and feeds in the context of lathe work. The angular velocity of the workpiece (rev/min) is called the "spindle speed" by machinists. Its tangential linear equivalent at the workpiece surface (m/min or sfm) is called the "cutting speed", "surface speed", or simply the "speed" by machinists.
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 ...
It relates to spindle speed via variables such as cutter diameter (for rotating cutters) or workpiece diameter (for lathe work). SFM is a combination of diameter and the velocity ( RPM ) of the material measured in feet-per-minute as the spindle of a milling machine or lathe . 1 SFM equals 0.00508 surface meter per second (meter per second, or ...
Programmers are usually machinist as well. A CNC programmer creates programs using software called CAM (computer aided manufacturing). The programmer must be proficient in math, speeds and feeds, machine tooling, work holding, and the different ways various materials react to stress and heat in the machining process.
Israel and Lebanon have accepted a proposal to end the 13-month border conflict that spiraled into an all-out war with Hezbollah. Here are the details about the Israel-Hezbollah ceasefire deal
Many Americans have been holding back from jumping into the housing market in the hopes that mortgage rates will decline. So far, they haven’t. The average 30-year mortgage rate has been above 6 ...
A Colombian school bus driver has been arrested on rape and kidnapping charges after a girl he allegedly snatched over a decade ago managed to escape, authorities said Thursday.
Spindle speed is derived from cutting speed, but cutting speeds and feeds deserve an article of their own, especially from a metalworking perspective. I'm not altogether happy with the intro and point form layout but I wanted to include woodworking and grinding as they are both affected by spindle speed slightly differently.