by Precision Twist
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The Precision Twist D31F is a short, straight flute, heavy-duty drill bit for best performance drilling into copper or synthetic materials. It can drill to a depth up to two-and-a-half times the diameter of the drill size. The shank diameter is the same as the drill size.
The D31F series has straight flutes often used to drill soft metals and plastics. The straight flutes prevent the bit from digging in. The uncoated finish helps increase chip flow in soft materials. Round shanks allow use with a wide variety of tool holding systems. The 140-degree point angle is common on carbide drills and helps the cutting edge cut into tough, hard materials quickly.
Made of carbide, a metallic carbide composite with binder material, many times harder/stiffer than high-speed steel (HSS), will hold an edge longer, and will 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 (fractional sizing) standards, which help 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 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.
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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