Hole Finishing Application Example Port Contour Cutters Port Contour Cutters • Dura-bar 65-45-12. CHALLENGE • Component: General cavity. • Ream SAE#8. • Surface finish below Ra 32 (inch). SOLUTION • Cermet-tipped port cutting tool. CUTTING • 2100 RPM–20 IPM. DATA • Flood coolant. • Machining centre. RESULT • Surface finish of 7–15 RA (inch). BENEFIT • Increase productivity by one-shot finishing of port. widia.com W75