The Precision Twist R15A jobber-length, general-purpose, round-shank drill bit drills holes with best performance in alloyed hardened steel, nodular graphite malleable cast iron, titanium, and alloyed nickel. It can drill to a depth up to four times the diameter of the drill size. The shank diameter is the same as the drill size. While the R15A series was designed for the aircraft industry, it... The 118-degree angles are the most commonly accepted standard for drilling holes in a variety of material, such as metal, wood, and synthetics. 118 Degree Drill Bits For Metal MICHIGAN DRILL 499 Series High-Speed Steel Jobber Drill Bit 2″ Black Oxide - Jumbo Industrial Black Oxide Drill Bits 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. They are made to ANSI (fractional sizing) industry standards, which ensure that drill bits around the world conform to the same specifications. High-speed steel (HSS), for use on a wide variety of materials The shank diameter is the same as the drill size. It can drill to a depth up to four times the diameter of the drill size. Drilling, or hole making, is the most common metalworking operation in the world. Right-hand twist brings chips up and away from the cutting edge. Champion US5-18 #18 118 Degree Point High Speed Steel Jobber Drill Bit These drill bits have a right-hand twist that brings chips up and away from the cutting edge. Round shanks, for use on a variety of tool-holding systems The flutes of the drill bit act a passageway for chip extraction from the hole and for coolant to enter the hole. Precision Twist Drill 15mm 118° High Speed Steel Jobber Drill Oxide Finish, Right Hand Cut, Spiral Flute, Straight Shank, 169mm OAL, Standard Point The steam tempering finish gives a strongly adhering blue oxide surface that acts to retain cutting fluid and prevent chip to tool welding, reducing the formation of a built-up edge.
