The Robert Charles Plain Shank Counterbore is a precision tool designed for engineers and machinists who need clean, accurate counterbores in metalworking projects. Made from M35-HSS-E with 5% cobalt, it delivers exceptional heat resistance and wear life for dependable performance.

• Material: M35-HSS-E with 5% cobalt for enhanced hot hardness, wear resistance, and sustained cutting performance in challenging materials.
• Shank Design: Plain shank allows easy fitment in standard tool holders, promoting stable, reliable machining and quick setup.
• Cap Screw Size: 5/8 in (0.625 in) cap screw size for compatible fixture and clamping applications.
• Pilot Size: 0.625 in pilot ensures precise starting alignment and consistent counterboring depth.
• Counterbore Performance: Geometrically engineered for accurate, clean counterbores with minimal burrs and smooth chip evacuation.
• Ideal Applications: Suited for precision engineering, automotive work, and general workshop use where durability and repeatable results matter.

With this counterbore, expect cleaner holes, improved alignment, and repeatable results across demanding jobs. The cobalt-infused high-speed steel edge maintains sharpness under heavy cutting, reducing rework and downtime, while the sturdy plain shank ensures dependable performance in everyday machining tasks.