Каталог Iscar сверла ружейные и для глубокого сверления 2022 - страница 119

GUNDRILLS USER GUIDE Standard Gundrill Length Calculations H Example Drilling of a ø10x500 depth hole on a gundrill machine with D ø25x70 mm driver code No. 57 (See page 302) D=10 W=500 LA=70 B=250 (or per experience) N W B F LA L=N+W+B+F+LA Ls L=(35-10)+500+250+13+70=858 (OAL) L Ls=N+W+B=770 (flute length) Standard Gundrill Carbide Head Length Ordering Code H For example: D and Ls are available as standard STGD-10000-0858-57-IC08 Diameter Range Head Length D 2.50-3.80 20 3.80-4.05 23 4.05-5.05 25 D= Cutting diameter 5.05-6.55 30 H= Carbide length 6.55-11.05 35 N= Regrinding area = H-D 11.05-18.35 40 W= Hole depth 18.35-21.35 45 B= Chip evacuation area = For typicalgundrill machines, 250 mm 21.35-23.35 50 = For machining centers, 2xD (minimum 15 mm) 23.35-26.35 55 F= 10 mm. 26.35-32.00 65 Note: regrindable length=H-D LA = Driver length LS = Flute length L= Overall length Pressure and Coolant Flow Rate for Gundrills Bar L/min 120 120 110100 P QL/D>100110100 90 90 80 80 70 L/D<100 70 60 60 50 50 40 40 302010 L/D>100L/D<100 302010 Ø 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 40 mm Drilling Diameter Q l/min P bar 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 for On equipment that uses water-soluble fluids (i.e. efficient chip flushing and cooling of the cutting edge machining centers and CNC machines), a concentration • It is recommended to use a filter under 20 µm 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 the tool and overloading the coolant pump and spindle seals • The coolant temperature should be between 20 and 22º C. Note: Above 50º C the viscosity of the coolant is reduced by 50% and becomes ineffective. 303