The Toolex Reamer with a straight shank and spiral flute, crafted in HSS-E, 8.40 mm, is a reliable tool for precision hole enlargement and finishing. Designed for machinists and fabricators who demand consistent accuracy, it delivers smooth bore finishes and tight tolerances across a variety of materials.

• Diameter: 8.40 mm
• Flute design: Spiral flute for efficient chip evacuation and smoother cutting
• Shank type: Straight shank for easy mounting in most toolholding systems
• Material: HSS-E (high-speed steel with cobalt) for enhanced hardness and heat resistance
• Applications: Precision hole enlarging and finishing with tight tolerances
• Performance: Consistent accuracy and long tool life across a wide range of materials

These features come together to minimize bore-wall burrs and deliver a uniform diameter throughout the bore. The spiral flute design improves chip clearance, reducing the risk of buildup and heat that can affect accuracy. The straight shank provides broad compatibility with drill presses, CNC mills, and other common holding systems, enabling quick changes and flexible setups. Suitable for a wide range of materials—from softer alloys to tougher steels—this reamer helps you achieve durable, repeatable bore finishes with less secondary processing.