Каталог Iscar вращающийся инструмент 2017 - страница 670

USER GUIDE Standard Gundrill Length Calculations H Example Drilling of a ø10x500 depth hole on a gundrill machine D with ø25x70 mm driver code No. 57 (See page 664) D=10 W=500 LA=70 B=250 (or per experience) N W B F LA L=N+W+B+F+LA Ls L L=(35-10)+500+250+13+70=858 (OAL) Ls=N+W+B=770 (flute length) Standard Gundrill Carbide Head Length Ordering Code For example: H D and Ls are available as standard STGD-10000-0858-57-IC08 Diameter Range Head Length 2.50-3.80 20 D 3.80-4.05 23 4.05-5.05 25 5.05-6.55 30 6.55-11.05 35 D = Cutting diameter 11.05-18.35 40 H = Carbide length 18.35-21.35 45 N = Regrinding area = H-D 21.35-23.35 50 W = Hole depth 23.35-26.35 55 B = Chip evacuation area 26.35-32.00 65 = For typical gundrill machines, 250 mm Note: regrindable length=H-D = For machining centers, 2xD (minimum 15 mm) F = 10 mm. LA = Driver length LS = Flute length L = Overall length Pressure and Coolant Flow Rate for Gundrills Bar L/min 120 120 110 Q GUNDRILLS 110 L/D>100 100 P 100 90 90 80 80 70 L/D<100 70 60 60 50 50 40 40 30 L/D>100 30 20 20 L/D<100 10 10 Ø 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 40 mm Q l/min P bar Drilling Diameter Gundrill Lubrication and Cooling Guidelines for Optimal Gundrill Performance The best performance is obtained by using oil. • It is recommended to use a strong coolant flow On equipment that uses water-soluble fluids for efficient chip flushing and cooling of the cutting edge (i.e. machining centers and CNC machines), a • It is recommended to use a filter under 20 µm concentration between 10% and 15% is recommended. Note: Improper filtration may result in interrupted flow of lubricating oil. This creates a sticky surface on the bearing pads and leads to premature wear of thetool and overloading the coolant pump and spindle seals • Temperature of the coolant should be between 20 and 22º C Note: Above 50º C the viscosity of the coolant is reduced by 50% and becomes ineffective. 666 ISCAR