In this kind of machining, you’re working with a tool called a broach, that’s essentially a cylindrical tool with teeth that are in increasingly larger sizes down the length of the tool. It cuts through material in two kinds of methods, push or pull. The former uses a vertical press-type machine, and the latter can use both a vertical and horizontal press-type machine to make square holes, keyways, spline holes, and more. These are usually backed by hydraulic power and, like saws, have a range of speeds, from as low as 5 fpm to as high as 50 fpm, depending on the metal or material you’re broaching.
