27/64In (10.72Mm) Jobber Drill Bit Bulk Pack - Gold Series

Product 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 Packaged in a reusable plastic hanging five-pack, keeping your drills safe, clean and dry. All Gold Series drills are also available as a single piece in our carded range. Click here to watch a video on the Alpha Gold Series Jobber Drills. Click here to find your closest Alpha Distributor.   TECHNICAL DATA Overall Length 133mm Flute Length 94mm Stainless Steel RPM 357 Tool Steel RPM 536 Cast Iron RPM 714 Malleable Iron RPM 804 Medium Carbon Steel RPM 893 Free Cutting Steel RPM 1280 Alum, Brass, Plastic RPM 1815 Wood RPM 2708 Feed per RPM (mm / rev) .25-.35 Standard Pack Qty 5   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 drill and workpiece 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 workpiece 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