sourcing map 2pcs Jobber Drill Bits 7mm (0.276") Black Nitride & Gold Titanium Coated M2 High Speed Steel (HSS) Twist Drill Bits for Stainless Steel Aluminum Alloy Metal

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Product description

  • Twist Drill Bits Cutting edge diameter 7mm 0.276"; round shank diameter 7mm 0.276"; cutting edge length 73mm 2.87"; overall length 109mm 4.29"; split point 135 degree. Used with hand drills, drill presses, bench drills, machining centers, CNC lathes, etc.
  • M2 High Speed Steel M2 high speed steel (HRC64-66) drill bits offer excellent heat resistance and hardness for durability and longevity, as well as good cutting performance and accuracy for clean, precise holes with minimal burrs.
  • Tips Use an appropriate lubricant to reduce friction and heat build-up. Controlling the speed is very important, recommended speed 100-800rpm min. The larger the diameter, the slower the speed required. If the hole is larger than 6mm, first drill a small hole with a 3.2mm-4mm drill bit, and then use a larger drill bit to enlarge the hole.
  • Wide Applications Drill bits produce holes in stainless steel, cast iron, A3 steel, carbon steel, aluminum alloy, copper, wood and plastic. Most suitable for drilling metals with a hardness less than HRC38, and cannot drill quenched metals, tiles, concrete, walls, stones.

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