Dormer - A100 1/2 hss Straight Shank Jobber Drills

Dormer: A100 1/2" HSS Staight Shank Jobbe Dills Series A100 general purpose drills for steels, cast steel, grey cast iron, malleable cast iron, nickel brass, aluminium alloy and graphite. Featuring a high-speed steel construction for strength in machining applications and a black oxide coating for increased heat and wear resistance Features and Benefits HSS construction for strength in machining applications Black oxide coating for improved heat an wear resistance Typical Applications Drilling Steel Cast iron Graphite Series A100 General purpose drills for steels, cast steel, grey cast iron, malleable cast iron, nickel brass, aluminium alloy and graphite. Point angle: 118, helix angle: normal, web thickness: standard, relief angle: 10 - 20, tolerance of diameter: h8, tolerance of shank: f11. Manufactured to BS 328/DIN338RN. Black Finish (W-Finish) This is the most common surface finish and is the result of a steam tempering operation in which steam is passed over the product during a