INFORMATION END MILL SELECTION BASICS END MILLS have cutting teeth on both end and side, permitting end cutting and peripheral cutting. Center cutting types permit plunge and traverse... milling. CUTTING EDGE: Select sharp edged for faster speeds. Select radial edged for longer tool life. SHANK DIAMETER: Select largest diameter available to maximize rigidity and minimize... axial deflection and chatter. NUMBER OF FLUTES: Select fewer flutes for milling softer materials at higher speeds and feeds where more chip space is required or when machine...