SUMIBORON ”Helical Master” Spiral CBN Endmill for Hardened Steel BNES Type Helical Cutting Edge Special Pocket Design BSNum35iB0ogrorande Endmills BNES Type with 1 Spiral Flute Stock Dimensions (mm) Cat. No. BN350 øD ød l1 l2 L BNES 1060 q 6,0 10 7,0 11 60 BNES 1080 q 8,0 10 10,0 14 70 BNES 1100 q 10,0 12 12,0 17 75 BNES 1120 q 12,0 12 14,0 20 80 BNES 1140 q 14,0 16 16,0 21,5 80 BNES 1160 q 16,0 16 18,0 24 80 Helix angle : 15˚ right-hand cut, right-hand helix Recommended Cutting Conditions Cutting speed: vc (m/min), Spindle revolutions: n (rpm), Feed per tooth: ft (mm/ tooth), Feed speed: vf (mm/min) Tooling example øD Hardened steel (HRC 50 ~ 57) Hardened steel (HRC 58 ~ 65) vc = 100 ~ 170 m/min vc = 80 ~ 150 m/min ø6 ~ 8 woc ≤ 0,1 mm n= vf (mm/min) = woc ≤ 0,08 mm n= vf (mm/min) =4000 ~ 9000 240 ~ 5403200 ~ 8000 150 ~ 370 ø 10 ~ 12 woc ≤ 0,15 mm n= vf (mm/min) =2700 ~ 5400 180 ~ 360woc ≤0,12 mmn= vf (mm/min)2100 ~ 4800 120 ~ 270 woc ø 14 ~ 16 woc ≤ 0,2 mm n= vf (mm/min) =2000 ~ 3800 140 ~ 260woc ≤0,15 mmn= vf (mm/min) =1600 ~ 3400 110 ~ 230 D Recommendation: Dry cutting (Air coolant)Down-cut milling Depth of cut : doc ≤ D Minimise the overhang Use a rigid machine Performance l Long Tool Life and High Efficiency l Excellent Surface Roughness Competitor’s coated solid carbide endmill for ”Helical Master” BNES 1080 ø 8,0 0,10 - shoulder milling hardened steel 0,08 - --> Vibration 0,06 - 0,04 - A direction B direction 0,02 - ”Helical Master” BNES 1120 Conventional straight flute CBN endmill, ø 8,0 0- l l l l l 1 2 3 4 5 Cutting length (m) Work material: X155CrVMo12-1 Hardness: HRC 60 A direction B direction Cutting data:vc= 100 m/min (Helical Master)0m,m05vc=40 m/min (Competitor’s coated solid carbide endmill)vf= 186 mm/minWork material:15Cr3Hardness:HRC 55~58Cutting data:vc=130m/minvf=310mm/minDown-cut milling Down-cut millingø10 mmDry cutting 0,05 mm ø8,0 mm Dry cutting M50 l = Euro stockq = Delivery on request Sumiboron / SumiDia Tools Flank wear width (VB / mm) mm8 doc mm4