1 SUMIBORON Flute Helical Master BNES Type 1 Coated Carbide Carbon Steel Alloy Steel Pre-hardened Tempered Steel Hardened Steel Stainless Ti Alloy Heat Resistant A loy Cast Iron Al Alloy Copper Alloy Graphite CFRP ● Special Endmill for Hardened Steel Steel Die Steel 45 to 55 55 to 60 60 to 65 Steel HRC HRC HRC Flute S S G G H H Grades Side Milling Helical Cutting Edge Special Pocket Design SumiBBoNro3n50 Grade ■ Cutter Body Dimensions (mm) –0.1 Cat. No. Stock Diameter Depth of cut Length Length Shank 0 DC DMM BN350 DC APMX LU LF DMM BNES 1060 D 6.0 7.0 11.0 60 10 1080 D 8.0 10.0 14.0 70 10 R0.2 APMX 1100 D 10.0 12.0 17.0 75 12 LU 1120 D 12.0 14.0 20.0 80 12 LF 1140 D 14.0 16.0 21.5 80 16 15° BNES 1160 D 16.0 18.0 24.0 80 16 ● For 3-dimensional profile milling, use SUMIBORON Ball Endmill BNBS Type, or MOLD FINISH MASTER BNBR Type Helix Angle or BNBP Type. ■ Recommended Cutting Conditions Hardness of work H 50 to 57HRC H 58 to 65HRC ae Conditions Cutting Speed 100 to 170m/min Cutting Speed 80 to 150m/min External Cutting Speed n Feed Rate vf Depth of Cut ae Cutting Speed n Feed Rate vf Depth of Cut ae øDc (mm) (min-1) (mm/min) (mm) (min-1) (mm/min) (mm) ap ø6 to 8 4,000 to 9,000 240 to 540 Up to 0.1 3,200 to 8,000 150 to 370 Up to 0.08 ø10 to 12 2,700 to 5,400 180 to 360 Up to 0.15 2,100 to 4,800 120 to 370 Up to 0.12 Max p = Endmill Diameter ø14 to 16 2,000 to 3,800 140 to 260 Up to 0.2 1,600 to 3,400 110 to 230 Up to 0.15 ● Dry cut (Air Blow) and Down cut are recommended. ● Make the tool overhang as short as possible and use a rigid machine. ■ Performance ● Long Tool Life and High Efficiency ● Excellent Surface Roughness Tooling · Side cut Conditions Tooling · Side cut Conditions ae · Work material : SKD11(Hardened) 60HRC · Work material : SCr15 · Conditions : (1) vc=100m/min ae A   +DUGHQHG 55 to 58HRC vf =186mm/min · Conditions : vc = 130m/min (2) vc=40m/min B vf = 310mm/min L vf =186mm/min ap Down cut, Dry ap Down cut, Dry ap = 4mm ae = 0.05mm SUMIBORON ap=8mm ae=0.05mm Results Results 0.12 (1) BNES1080 2 m 2 m Flank Wear Width (mm) 0.10 F 0.25mm 0.25mm 0.08 Notch wear Chattering 0.06 (2) Comp. A’s Coated endmill Able to continue A Dir. B Dir. F for hardened steel 0.04 D D (2) Straight flute 2 m 2 m D D D type (ø8) 0.02 (1) BNES1120 0.25mm 0.25mm 0 5 10 15 20 25 Cutting Distance (m) A Dir. B Dir. L119