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Metal Drilling Drill Bit

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Metal Drilling Drill Bits actually is High Speed Steel Twist Drills. The Twist Drill is the most common type of drill. The shank of the drill is held by the machine tool, which in turn imparts a rotary motion. This shank may be straight or tapered. The body of the drill is typically made up of two spiral grooves known as flutes, which are defined by a helix angle that is generally about 30 degree but can vary depending on the material properties of the workplace. The point of the drill generally form a 118° angle and includes a 10 degree clearance angle and chisel edge .The chisel edge is flat with web thickness of approximately 0.015 x drill diameter. This edge can cause problems in hole location owing to its ability to "walk" on a surface before engaging the workplace. In the case of brittle materials, drill point angles of less than 118 are used, while ductile materials use larger points angles and smaller clearance angles.

Metal Drilling Drill Bit is a kind of cutting tool widely used for metal, like aluminum, alloy, copper, steels, stainless steel, iron, etc.

There are usually the following types of twist drills: Straight Shank Twist Drill Bit, Morse Taper Shank Twist Drill Bit, Reduced Shank Twist Drill Bit, Step Drill Bit, Hex Shank Twist Drill Bit, Three Flats Twist Drill Bit, Double Ended Drill Bit.

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