Каталог Iscar сверла ружейные и для глубокого сверления 2022 - страница 111

GUNDRILLS USER GUIDE Drill Penetration Instructions on Horizontal Pressure and Coolant Flow Rate for SUMOGUN Milling and Lathe machines Bar l/min Note: The following procedure (1-4) is recommended for 120 300 up to 400 mm hole depths using MNSNT ...-400... drill. 110 275 1 Drill a pilot hole 0.5xD deep with a short drill in 100 250 the same diameter as of the SUMOGUN drill. 90 225 2 Enter the pre-hole at slow speed, feed and 50 80 200 RPM until 1-2 mm before reaching the bottom. 7060 175150 3 Activate the cooling system and increase rotation speed 50 125 to recommended drilling speed, maintain for 2-3 seconds, 40 100 then continue at recommended drilling feed. No pecking 30 75 is required. Apply maximum possible coolant flow rate. 2010 5025 4 After having reached the required depth, reduce speed to 50-100 RPM while exiting from the hole. Ø 10 12 14 16 18 20 22 24 26 mm SUMOGUN DrillinSgUMRaOnGgUeN Drilling RangeDrillingDDriiallimngetDeirameter 1 Pre-hole 1xD deep for centering Q l/min P bar GUNDRILL Machines Milling and Turning Machines 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 1xD between 10% and 15% is recommended. 2 Slow rotation and feed while entering to the pre-hole Guidelines for Optimal Gundrill Performance • Coolant pressure and flow • It is recommended to use a strong coolant flow for efficient chip flushing and cooling of the cutting edge • Filtration: It is recommended to use a filter under 20 µm. • Note: Improper filtration may result in interrupted flow of the lubricating oil. This creates a sticky surface on the bearing pads and leads to premature wear of the tool 1xD and overloading the coolant pump and spindle seals. 3 Maintain for 2-3 seconds and activate the cooling system • 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. 1xD 4 Continue drilling at recommended cutting conditions SUMOGUN 295