Irwin 10502661 7mm HSS TCT Tip Drill Bits

General description The Irwin HSS TCT Tip Drill Bit is designed for precision drilling in various hard materials, including hardened steel, cast iron, bronze alloys, and manganese alloyed steel. Featuring a Tungsten Carbide Tipped (TCT) design, this drill bit ensures efficient performance and durability. Technical specifications Diameter: 7.0mm Total length: 109mm Working length: 69mm Material: Chrome Vanadium Steel, hardened to 56 Rockwell C Carbide tip hardness: Up to 50 Rockwell C Usage For optimal performance, it is recommended to use a coolant while drilling with TCT twist drill bits. Irwin suggests a coolant emulsion of 3-6%, which helps to extend the lifetime of the drill bit. Other information