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The Precision Twist D33M jobber-length, uncoated, heavy-duty carbide, round shank drill bit drills holes into a wide variety of metals and synthetic materials. It can drill to a depth up to three times the diameter of the drill size. The shank diameter is the same as the drill size.
The D33M series has a type N flute form, with a standard spiral (21- to 34-degree) helix angle, and performs best when drilling into copper and synthetic materials. The uncoated finish helps increase chip flow in soft materials. 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. Round shanks allow use with a wide variety of tool holding systems.
It is made of carbide, a metallic carbide composite with binder material, which is much harder and stiffer than high-speed steel (HSS), and will hold an edge longer, and deflect less than HSS. These are also more resistant to heat than HSS. These qualities allow it to run at higher speeds and feeds. They are made to ANSI industry standards, which ensure that drill bits around the world conform to the same specifications.
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 can be used in hand-operated drills, standalone drill presses, or a lathe.
Precision manufactures machine tools under the following brands: Precision Twist, Precision Dormer, and Union Butterfield. They have locations around the world, and provide tools adhering to ANSI, NAS, and DIN standards.
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