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Dormer A720.16 Micro Drill, Short, Bright, High Speed Steel Cobalt, 0.16 mm Head Diameter, 1.4 mm Flute Length, 25 mm Full Length, 1 mm Shank Diameter (Pack of 10)
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About Dormer A720.16 Micro Drill, Short, Bright, High
The Precision Twist A720 micro-sized drill bit is a 118-degree conventional point, round-shank drill bit made of high speed steel and cobalt with an uncoated finish. For best performance, use when drilling into steel and cast iron. It is suitable for drilling to a depth up to two-and-a-half times the diameter of the drill. The shank diameter is the same as the drill size. The A720 series has a type N flute form, with a regular helix (21 to 34 degrees) angle. Uncoated (bright) tools have no finish or coating. They are a common choice for general use applications. Spiral flutes act as a passageway for chip extraction from the hole and for coolant to enter the hole. Right-hand twist brings chips up and away from the cutting edge. The combination of high speed steel and cobalt make a good combination of toughness and hardness, which help prevent breakage in such small-sized drills. Drilling, or hole making, is the most common metalworking operation in the world. Twist drill bits are the most common type of drill bit used. Twist drill bits are commonly used to drill holes with hand-operated drills, standalone drill presses, or lathes. The flutes of the drill bit act a passageway for chip extraction from the hole and for coolant to enter the hole. These drill bits have a right-hand twist that brings chips up and away from the cutting edge. They are made to DIN 1897 industry standards (metric sizing), which helps ensure that drill bits around the world, conform to the same specifications. Dormer Pramet manufactures cutting tools under the following brands: Precision Twist Drill, Dormer, Union Butterfield and Pramet. The company has locations around the world, and provides tools adhering to ANSI, NAS, and DIN standards.
