670 Каталог ISCAR 2017 Вращающийся режущий инструмент и инструментальная оснастка Стр.666

Каталог ISCAR 2017 Ротационный инструмент Стр. 666 0670 ENG Lab2u

GUNDRILLS USER GUIDE ISCAROUNL Standard Gundrill Length Calculations Standard Gundrill Carbide Head Length H = Carbide length N = Regrinding area = H-D W= Hole depth B = Chip evacuation area = For typical gundrill machines, 250 mm = For machining centers, 2xD (minimum 15 mm) F = 10 mm. LA = Driver length LS = Flute length L = Overall length Example Drilling of a 010x500 depth hole on a gundrill machine with 025x70 mm driver code No. 57 (See page 664) D=10 W=500 LA=70 B=250 (or per experience) L=N+W+B+F+LA L=(35-10)+500+250+13+70=858 (OAL) Ls=N+W+B=770 (flute length) Ordering Code For example: D and Ls are available as standard STGD-10000-0858-57-IC08 Diameter Range Head Length 2.50-3.80 20 3.80-4.05 23 4.05-5.05 25 5.05-6.55 30 6.55-11.05 35 11.05-18.35 40 18.35-21.35 45 21.35-23.35 50 23.35-26.35 55 26.35-32.00 65 Note: regrindable length=H-D Pressure and Coolant Flow Rate for Gundrills Gundrill Lubrication and Cooling The best performance is obtained by using oil. On equipment that uses water-soluble fluids (i.e. machining centers and CNC machines), a concentration between 10% and 15% is recommended. Guidelines for Optimal Gundrill Performance It is recommended to use a strong coolant flow for efficient chip flushing and cooling of the cutting edge It is recommended to use a filter under 20 pm 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 22° C Note: Above 50° C the viscosity of the coolant is reduced by 50% and becomes ineffective. 666 ISCAR