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

Description

Twist drill bits are the most common type of drill bit used. The parabolic design, combined with a parallel thinned web, allows for smooth and efficient chip evacuation. 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. 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. The stub length offers more stiffness than a jobber-length drill bit. The shank diameter is the same as the drill size. They are made to ANSI and DIN industry standards, which help ensure that drill bits around the world conform to the same specifications. The composition of HSS and cobalt offers a combination of toughness and hardness needed for deep hole drilling. 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. With proper cutting conditions and rigid machine setup, holes to H10 tolerance can consistently be achieved.

Key Features

• This coating is most suitable for use on ductile cast iron and carbon steel.
• The parabolic design, combined with a parallel thinned web, allows for smooth and efficient chip evacuation.
• 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 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.
• The Dormer A921 Spectrum stub-length drill bit is a 130-degree, PFX point, round shank drill bit made of HSS and cobalt.
• 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.