Dormer A92135/64 Screw Machine Drill - 0.5469, 35/64, 64, a921

Description

The composition of HSS and cobalt offers a combination of toughness and hardness needed for deep hole drilling. Twist drill bits are the most common type of drill bit used. It has an Aluminum chromium nitride (AlCrN) coating (also called Smooth-Flow coating), which helps increase chip removal and helps in wear resistance, and combines hardness in high heat with high oxidation resistance. The Dormer A921 Spectrum stub-length drill bit is a 130-degree, PFX point, round shank drill bit made of HSS and cobalt. This coating is most suitable for use on ductile cast iron and carbon steel. It can drill holes up to three times the diameter of the drill. With proper cutting conditions and rigid machine setup, holes to H10 tolerance can consistently be achieved. The right-hand twist brings chips up and away from the cutting edge. The shank diameter is the same as the drill size. These are also more resistant to heat than HSS. They are made to ANSI and DIN industry standards, which help ensure that drill bits around the world conform to the same specifications. These qualities allow it to run at higher speeds and feeds. The spiral flutes act as a passageway for chip extraction from the hole and for coolant to enter the hole. Made of HSS with cobalt which is many times harder and stiffer than HSS, will hold an edge longer, and will deflect less than HSS. Drilling, or hole making, is the most common metalworking operation in the world. Twist drill bits are commonly us.

Key Features

• It has an Aluminum chromium nitride (AlCrN) coating (also called Smooth-Flow coating), which helps increase chip removal and helps in wear resistance, and combines hardness in high heat with high oxidation resistance.
• The parabolic design, combined with a parallel thinned web, allows for smooth and efficient chip evacuation.
• The Dormer A921 Spectrum stub-length drill bit is a 130-degree, PFX point, round shank drill bit made of HSS and cobalt.
• The A941 series has a type W flute form, with a fast helix angle of 35 to 45 degrees, and is most suitable for drilling into steel, stainless steel, titanium, nickel, and alloyed aluminum.
• This coating is most suitable for use on ductile cast iron and carbon steel.
• This design allows for single-pass drilling, which helps eliminate the need for pecking in up to three times the drill diameter deep holes, thus offering improved efficiency and increased productivity.