Alpha Gold Series 13.0 mm Jobber Drill Bit
When you go to buy a drill bit, what are you needing ? Just a drill ? or do you actually want HOLES ?
Rigorous independant testing has proven that the Gold Series Drills outperform other Australian drills on the market by more than 30% - giving you more holes for your dollar in every single drill bit !
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.
Gold Series Drills are also available as a single piece in our carded range.
TECHNICAL DATA
Overall Length 151mm
Flute Length 101mm
Stainless Steel RPM 306
Tool Steel RPM 458
Cast Iron RPM 611
Malleable Iron RPM 688
Medium Carbon Steel RPM 764
Free Cutting Steel RPM 1070
Alum, Brass, Plastic RPM 1528
Wood RPM 2292
Feed per RPM (mm / rev) .25-.35
Standard pack Qty 1
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.