Technical Guidance Tool wear shapeFlank wear width (mm) Good f Size accuracy (m/min)vcCutting speed Flank wear width VB (mm) Number of pass (m/min)vcCutting speed Surface roughness Rmax (mm) Technical Guidance SUMIBORON Cast Iron Machining Advantages of Using SUMIBORON for Cast Iron Machining Higher accuracy Longer tool life at higher cutting speeds GG: Grey cast iron GGG: Ductile cast iron Ceramic Coated carbide CermetBNS800BN7000BNC500 BNS800 BNX10BN7000BNC500CeramicCoated carbideBNC500 Cermet Ceramic BN7000 Coated carbide Cermet Good f Surface roughness Ra (μm) Tool life ratio Tool life ratio Turning Cast iron structure and wear shape examples GG GGG 0,40,3 DRY 10Work material: GG25Insert: SNGN120408(BN500)8Cutting data:vc = 450 m/min6 Structure 0,2 doc = 0,25 mmf= 0,15 mm/rev 4 0,1 Continuous cutting 2 WETMatrixPearlitePearlite + Ferrite02,557,51012,5Cutting length (km) 0 200 400cutting speed Vc (m/min) Wet WET DRY Machine: N/C lathe(WaterWork material: GG25(HB200) soluble) Holder: MTJNP2525 Insert: TNMA160408(BN500) Cutting data: vc = 110~280 m/min Dry doc = 0,1 mm Crater wear For machining cast iron with SUMIBORON, cutting speeds (Vc)(vc ≥ 200 m/min)should be 200m/min and above. WET cutting is recommended. f = 0,1 mm/revWET Milling SUMIBORON BN Finish Mill EASY - High speed machining Vc = 2000m/min - Surface Roughness Rz=3,2 (Ra=1,0) - Running cost is reduced because of economical insert - Easy insert setting with the aid of a setting gauge - Safe, anti-centrifugal force construction for high speed conditions 0,25 250 Ceramic Cutting data: Vc=400m/min Vc=600m/min doc = 0,5 mm, ft = 0,15 mm/tooth 0,20 200 Dry 0,15 Vc=600m/min Vc=1000m/min 150 0,10 100 Typical thermal crack 0,05 Vc=1500m/min 50 Wet 0 0 0 20 40 60 80 100 120 140 160 180 200 300 450 600 750 900 1050 1200 1350 1500 Number of pass Cutting speed (m/min) Dry cutting is recommended for high speed milling of cast iron Work material: GG25Tool material:BN700 with SUMIBORON. Cutting data: doc = 0,5 mm, f t = 0,1 mm/tooth, DRY N18