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Head Diameter 0.6406 Flute Length 2.874 Bright High Speed Steel Cobalt Dormer A92041/64 Screw Machine Drill Bit Full Length 4.4881
Dormer A92041/64 Screw Machine Drill Bit, Bright, High Speed Steel Cobalt, Head Diameter 0.6406', Flute Length 2.874', Full Length 4.4881': Industrial & Scientific. Dormer A92041/64 Screw Machine Drill Bit, Bright, High Speed Steel Cobalt, Head Diameter 0.6406", Flute Length 2.874", Full Length 4.4881": Industrial & Scientific. The A900 stub-length drill bit is a 0-degree, PFX point, round shank drill bit made of HSS and cobalt. It can drill holes up to three times the diameter of the drill. The shank diameter is the same as the drill size. The A900 is designed to replace the A907, QC21CO and QC21COM series with higher performance. 。 The A900 series has a type W flute form, with a fast helix angle of 35 to 45 degrees, and are most suitable for drilling into steel, stainless steel, titanium, nickel, and alloyed aluminum. This design allows for single pass drilling, which eliminates the need for pecking in up to three times the drill diameter deep holes, thus offering improved efficiency and increased productivity. The stub length offers the greatest rigidity of the various drill bit lengths. The composition of HSS and cobalt is a combination of toughness and hardness needed for deep hole drilling. The parabolic design, combined with a parallel thinned web, allows for smooth and efficient chip evacuation. With proper cutting conditions and rigid machine setup, holes to H10 tolerance can consistently be achieved. 。 The uncoated finish helps increase chip flow. Spiral flutes act as a passageway for chip extraction from the hole and for coolant to enter the hole. The right-hand twist brings chips up and away from the cutting edge. 。 Made of HSS with cobalt which is many times harder and stiffer than HSS, will hold an edge longer, and will deflect less and be more resistant to heat than HSS. These qualities allow it to run at higher speeds and feeds. They are made to ANSI and DIN industry 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. 。 Pramet manufactures cutting tools under the following brands: Precision Twist Drill, , Union Butterfield and Pramet. The company has locations around the world, and provides tools adhering to ANSI, NAS, and DIN standards. 。 。 。 。 。
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