A full-revolution press has 100 rpm flywheel rotation. The press is equipped with two-hand palm buttons mounted on the machine at a distance of 20 inches from the point of operation. How many engagement points on the flywheel would be necessary to make this machine safe?
Safety Distance = 60/rpm(1/2 + 1/n) * 63
20 = 60/100(1/2 + 1/n) * 63