Robert Charles Single Flute Countersink 90° - M35-HSS-E 5% Cobalt - Metric - 28mm Head Dia

The Robert Charles Single Flute Countersink 90° – M35 HSS-E 5% Cobalt – Metric is a precision countersink designed to cleanly countersink, chamfer, and deburr metric holes. It’s ideal for machinists, engineers, tradespeople, and hobbyists who need accurate, repeatable results with a clean finish.

Built from premium M35 HSS-E with 5% cobalt, this countersink offers superior heat resistance, hardness, and extended tool life. It stands up to demanding materials like stainless steel, alloy steels, and non-ferrous metals, making it a reliable choice for everyday machining and production work. The 28 mm head diameter provides stability and consistent depth control for repeatable performance.

• Longer tool life in tough materials: The M35 HSS-E with 5% cobalt formulation delivers enhanced hardness and heat resistance, helping the countersink maintain sharpness and extend service intervals when working with stainless steel and other hard alloys.
• Fast, clean countersinking with a single flute: The single-flute design minimizes chip buildup and chatter, delivering smoother entry and exit and a faster, more consistent finish on chamfers and deburrs.
• Precise 90° geometry with stable 28 mm head: Exact 90-degree countersink geometry combined with a robust 28 mm head diameter ensures repeatable depth and uniform chamfers across multiple holes.

This tool helps you achieve precise, professional results with less downtime and rework. Its durable construction and proven geometry support reliable performance across a wide range of materials, improving workflow, reducing setup time, and delivering consistent, quality finishes on every hole.