(m/min)Cutting speed Cutting Speed (m/min)Cutting Speed (m/min) Cutting Speed (m/min) Hardened SteelCastIron Finishing Cutting Speed (m/min) Tolerance Good CBN Tools SUMIBORON series H Advantages of using CBN HARDENED STEEL MACHINING In terms of cost investment, it is much lower in machine cost and overhead cost due to the fact that aCNC lathe is cheaper than a grinding machine. As for the quality of finish, inserts can machine different profiles and the finishing is also commendable as compared to grinding. Environmentally, sludge treatment for grinding is a hazard to the environment but for turning, the chips can be collected and recycled. - Application Range Conditions Recommended Cutting Speed (m/min) BNC100 Application BNC2010 BNC160 GeneralPurpos BNC200 (Continuous toLight interrupted Rz = above 3,2) BNC2020 Heavy BNC300 Interrupted High Precision (Rz = 1,6 to 3,2) Interruption Strength High Effiziency Frequency of Continuous Light Interrupted Medium Interrupted Heavy Interrupted (Carburized layer Interruption Small Impact Force on Cutting Edge Large removal) Ductile Cast Iron K Advantages of using CBN CAST IRON MACHINING Following charts show merits of using CBN in cast iron machining compared with conventionaltools, such as carbide, cermet or ceramics. SumiBoron performs longer tool life than conventional tools in high speed machining and brings higher efficiency and superior precision. High Speed Machining High Speed Machining High Precision Machining Grey Cast Iron Ductile Cast Iron Ceramic Coated Carbide Cermet Ceramic Ceramic Coated Carbide Coated Carbide Cermet Cermet Tool Life (Ratio) Tool Life (Ratio) Surface Roughness (µm) - Application Grey Cast Iron Ductile Cast Iron Range Finishingregion Roughing region BNC500 AC405K, AC415K, AC420K BN7000 Depth of Cut (mm) Depth of Cut (mm) L3 a SUMIBORON