General description This high-quality IRWIN® HSS TCT tip drill bit is designed for precision drilling in hardened materials such as steel, cast iron, bronze alloys, and manganese steel. It features a four-faceted ground tip for accurate centering and low drilling pressure, ensuring optimal performance. Technical specifications Diameter: 8.0mm Total length: 117mm Working length: 75mm Material: Chrome vanadium steel with tungsten carbide tip Hardness: Drill body hardened to 56 Rockwell C; tip can drill materials up to 50 Rockwell C Compatibility and accessories Compatible with stationary drill machines Requires coolant (recommended: 3-6% emulsion) for optimal performance and longevity Installation Insert the drill bit into the drill chuck securely Ensure the drill is set to appropriate speed for hardened steel drilling Apply coolant during operation to prevent overheating and wear Usage Use for drilling hardened steel, cast iron, bronze alloys, and manganese steel Maintain steady