Precision Twist QC41G High Speed Steel Short Length Drill Bit, TiN Coated, Round Shank, Parabolic Flute, 135 Degree Radius Split Point, #28 (Pack of 12)

The Precision Twist QC41G stub-length drill bit is a parabolic flute design, 135-degree radius, split-point, round shank drill bit made of HSS with TiN coating. It is suitable for drilling to a depth up to three-and-a-half times the diameter of the drill. Good for portable or machine drilling. The shank diameter is the same as the drill size. It was designed for drilling holes into a wide variety of metals and synthetic materials with best performance in steel, cast iron, and copper. The QC41G series has a wide land parabolic flute design that enhances chip formation and evacuation of chips (called swarf). Coolant has a better flow to the drill point for heat dissipation, and higher speeds and feeds for increased productivity. It is recommended with this design to use a constant heavy feed rate while drilling. This design has a reinforced web which provides increased drill strength and rigidity, and straighter closer tolerance holes. Titanium nitride (TiN) is a gold-colored ceramic coating that combines hardness and low friction to extend cutting tool life and permits faster cutting speeds than with uncoated tools. The finish helps increase chip flow in soft materials. 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. They are made to DIN 1897 industry standards (metric sizing), which helps ensure that drill bits around the world conform to the same specifications. Dormer Pramet manufactures cutting tools under the following brands: Precision Twist Drill, Dormer, Union Butterfield and Pramet. The company has locations around the world, and provides tools adhering to ANSI, NAS, and DIN standards.

• Parabolic flute design offers enhanced chip removal, coolant flow to the drill point and heat dissipation
• Short-length drill bits, also called stub length, provide better rigidity and increased strength
• 135-degree, split-point angles, are self-centering, reduces walking, good for hard material and reduces pressure on cutting edges
• Titanium nitride (TiN) is a coating to extend cutting tool life and permit faster cutting speeds than with uncoated tools
• High-speed steel (HSS), for use on a wide variety of materials