Work Material Cast Iron K Turning Insert Selection Guide / Cast Iron Recommended Cutting Conditions Grades A Coated SUMIBORON SUMIBORON Solid SUMIBORON Page L7 BNC500 BN7000 BNS800 Grades ● FC (Grey Cast Iron) ● FCD (Ductile Cast Iron) (m/min) (m/min) 2,000 500 Steel 1,000 High Speed BN7000 Continuous Cutting AC405K Stainless Cutting Speed (vc) BNS800 Cutting Speed (vc) 300 1st Recommended Grade for Cast Iron High Speed Steel 500 Continuous Cutting AC415K AC405K BNC500 300 200 Iron 1st Recommended Grade for Cast Iron Mill-Scaled AC415K Mill-Scaled Work/Interrupted Cutting Cast 200 Work/Interrupted Cutting AC420K AC420K Exotic Alloy 100 AC8025P 100 AC8025P Finishing Roughing Finishing Roughing Hardened Steel Continuous Cutting General Cutting Interrupted Cutting Continuous Cutting General Cutting Interrupted Cutting Non-Ferrous Metal Chipbreakers Small Product Negative Type Positive Type Machining (mm) (mm) Depth of Cut (ap) 6.0 No Breaker Roughing Depth of Cut (ap) 6.0 Roughing Large No Large GZ Breaker MU GZ Medium Cutting 4.0 No Breaker Medium Cutting No 4.0 GZ Breaker UZ of Cut (UX) of Cut 2.0 2.0 MU MU Depth Finishing UZ Depth Finishing UZ (Sharper Edge and Low Cutting Force) 0 0.2 0.4 0.6 Sharp Edge Strong Edge 0 0.2 0.4 0.6 Sharp Edge Strong Edge Feed Rate f (mm/rev) Feed Rate f (mm/rev) K Recommended Cutting Conditions Cast Iron (Red text indicates 1st recommendation.) Applications Cutting Chipbreakers Grades FC (Grey Cast Iron) Min. - Optimum - Max. FCD (Ductile Cast Iron) Min. - Optimum - Max. Process Feed Rate f (mm/rev) Cutting Speed vc (m/min) Feed Rate f (mm/rev) Cutting Speed vc (m/min) High Speed Continuous to General No BN7000 0.1-0.2-0.5 500-1,500-2,000 ̶ ̶ Cutting Continuous No BNC500 ̶ ̶ 0.1-0.20-0.4 200-350-500 Continuous UZ AC405K 0.1-0.25-0.4 230-400-570 0.1-0.25-0.4 170-350-500 Finishing General UZ AC415K 0.1-0.25-0.4 200-350-500 0.1-0.25-0.4 150-300-450 Interrupted GZ AC415K 0.1-0.30-0.5 150-275-400 0.1-0.30-0.5 150-250-350 Light Continuous GZ AC405K 0.1-0.30-0.5 170-315-460 0.1-0.30-0.5 170-285-400 Interrupted General GZ AC415K 0.1-0.30-0.5 150-275-400 0.1-0.30-0.5 150-250-350 Medium Interrupted GZ AC420K 0.1-0.30-0.5 100-200-300 0.1-0.30-0.5 80-150-220 Roughing Continuous GZ AC415K 0.1-0.30-0.5 150-275-400 0.1-0.30-0.5 150-250-350 (Mill-Scaled General GZ AC420K 0.1-0.30-0.5 100-200-300 0.1-0.30-0.5 80-150-220 Work) Interrupted No AC420K 0.2-0.35-0.6 100-175-250 0.2-0.35-0.6 80-130-180 A14