Hertel 2410207 Chucking Reamer 5/16 in Hss 6 Flute

Product Description

The HERTEL 2410207 is a high-speed steel (HSS) chucking reamer designed to finish-ream drilled holes to precise, consistent diameters in metal workpieces. It measures 5/16 inch (0.3125 inch decimal) in diameter with a 6 inch overall length and a 1-1/2 inch flute length. The bright, uncoated HSS construction handles a broad range of ferrous and non-ferrous materials. With 6 flutes in a left-hand spiral and right-hand cutting direction, this reamer removes material evenly on the return stroke, improving hole finish. The straight-cylindrical shank seats directly in standard drill chucks or collet holders. Machinists and tool-and-die professionals use this reamer in lathes, drill presses, and CNC machining centers where accurate hole sizing is required.

This chucking reamer is suited for general-purpose machine reaming operations in job shops, production environments, and maintenance facilities. It is appropriate for through-holes and blind holes in steel, cast iron, aluminum, brass, and similar machinable materials. The 0.3125 inch diameter falls within the 0.3000 to 0.3499 inch reamer diameter range, making it a standard fractional size used across a wide variety of fixture, jig, and assembly applications where hole tolerance and surface finish are critical.

Key Features

• 5/16 inch (0.3125 inch) diameter with 6 inch overall length and 1-1/2 inch flute length
• High-speed steel (HSS) construction for durability across ferrous and non-ferrous materials
• 6-flute left-hand spiral design promotes smooth chip evacuation and improved hole finish
• Right-hand cutting direction for conventional machine reaming operation
• Bright/uncoated finish — no coating buildup to affect finished hole diameter
• Straight-cylindrical shank compatible with standard drill chucks and collet tool holders

Compatibility

Designed as a standard fractional chucking reamer for use in lathes, drill presses, milling machines, and CNC machining centers equipped with a drill chuck or straight-shank collet holder sized for a 5/16 inch shank.

Installation Notes

Chucking reamers are installed and removed by qualified machinists following standard machine tool lockout/tagout procedures before changing tooling. Ensure the chuck or collet is clean and the shank is fully seated before operation. Use appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish. Do not use a chucking reamer to remove excessive stock — pre-drill or bore the hole to within a few thousandths of finished size before reaming.