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

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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

up to 400 mm hole depths using MNSNT ...-400... drill.120300
110275
1 Drill a pilot hole 0.5xD deep with a short drill in100250
the same diameter as of the SUMOGUN drill.90225
2 Enter the pre-hole at slow speed, feed and 5080200
RPM until 1-2 mm before reaching the bottom.70175
60150
3 Activate the cooling system and increase rotation speed50125
to recommended drilling speed, maintain for 2-3 seconds,40100
then continue at recommended drilling feed. No pecking 3075
is required. Apply maximum possible coolant flow rate.2050
1025
4 After having reached the required depth, reduce

speed to 50-100 RPM while exiting from the hole. Ø10 12 14 16 18 20 22 24 26 mm

SUMOGUN Drilling Range SUMOGUN Drilling RangeDrilling DiameterDrilling Diameter 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 between 10% and 15% is recommended. 1xD

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 and overloading the coolant pump and spindle seals.

1xD

  • The coolant temperature should be between 20 and 22º C.

3 Maintain for 2-3 seconds and activate the cooling system

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