7/64in (2.78mm) JOBBER DRILL BIT - GOLD SERIES

Product Code: 9LI764

          







$2.97 ex GST
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Available to Order
Pack Quantity
1
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Description
DRILL FEATURES
  • M2 HSS Fully ground M2 HSS material increases drill life
  • Titanium Nitride coating reduces heat and increases lubricity for extended life
  • 135 Degree Split Point cuts faster and reduces wandering

Alpha Gold Series Drills are packaged in a reusable plastic hang pack, keeping your drills safe, clean and dry.

TECHNICAL DATA
Overall Length 125mm
Flute Length 81mm
Stainless Steel RPM 1364
Tool Steel RPM 2045
Cast Iron RPM 2727
Malleable Iron RPM 3068
Medium Carbon Steel RPM 3409
Free Cutting Steel RPM 4886
Alum, Brass, Plastic RPM 6932
Wood RPM 10341
Feed per RPM (mm / rev) .15-.25
Standard pack Qty 10

DRILLING PRACTICE

The flute form, web thickness and split point of the standard Alpha drills are suitable for most materials forming fine chips. For effective drilling, the rigidity of the drilland work piece are most important. The shorter the flute length the more rigid the drill. Long drills must be adequately supported to reduce vibration.

The following are important in drill use :

  • Clamp the work piece securely
  • Select the correct speed and feed
  • Use an appropriate coolant or lubricant
  • Ensure the shank is securely held. Avoid using worn drill chucks as the drill may slip during use.
  • Regrind the point or replace the drill before it dulls, do not force a worn drill.
  • When deep hole drilling, withdraw frequently to clear the chips ( deep holes start at 4X the diameter)
  • For stainless steel, manganese and high tensile steels, do not allow the drill to swell as it will cause work-hardening. Use a slower speed and heavier feed for these materials.
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