UVA air-driven grinding spindle
Operating manual
EXAMPLE
For a given job a 5/16 in. wheel and a cutting speed of 5900 fpm are to be used. Find the required rpm. Draw a horizontal line from 5/16 on the wheel diameter scale to the diagonal line for 5900 fpm. From there drop a veitical line to the rpm scale and read off 72,000 rpm.