GRINDING MACHINES
buffing wheel mounted in its place for buffing and polishing. The 1/4-HP electric motor revolves at a maximum of 3,450 RPM. The maximum cutting speed of the 4-inch-diameter wheel is approximately 3,600 SFPM. Bench-Type Tool and Cutter Grinder The bench-type tool and cutter grinder, see Figure 5-4, was designed primarily to grind end mills.