Armstrong cobalt drill bits are designed for drilling into tough metals like stainless steel and hardened steel. They are made from high-speed steel with a cobalt alloy, which provides increased heat and abrasion resistance. These bits typically feature a 118-degree split-point tip for accurate positioning and reduced drilling pressure. Armstrong cobalt drill bits are often sold in sets or by the tube.
Key Features and Specifications:
Material: Cobalt high-speed steel (HSS).
Cobalt Content: Often 5% cobalt.
Tip Design: 118-degree split-point for accurate starts and reduced walking.
Heat Resistance: Excellent heat resistance, allowing for higher drilling speeds and longer run times without cooling.
Abrasion Resistance: Cobalt alloy enhances wear resistance, making them suitable for abrasive materials.
Applications: Drilling stainless steel, hardened steel, and other tough metals.
