Hertel 2410256 Chucking Reamer 25/64 in Hss 6 Flute

Product Description

The HERTEL 2410256 is a 6-flute high-speed steel (HSS) chucking reamer designed to bring bored or drilled holes to a precise finished diameter. The cutting direction is right-hand, while the spiral flutes are left-hand wound — a geometry that reduces chatter and pulls chips away from the finished bore. The tool measures 0.3906 inches (25/64 inches) in diameter, with a 7-inch overall length and a 1-3/4-inch flute length. The bright, uncoated HSS construction suits a broad range of ferrous and non-ferrous workpiece materials in machine-shop and maintenance environments.

This reamer is intended for use in drill presses, lathes, machining centers, and CNC operations where a straight-cylindrical shank is accepted by the chuck or collet. It is suited to production and job-shop reaming operations where a consistent hole diameter in the 0.3500 to 0.3999 inch range is required. Machinists, toolroom technicians, and maintenance professionals performing precision hole finishing will find this tool appropriate for through-hole and blind-hole applications where chip evacuation toward the entry side of the hole is acceptable.

Key Features

• 25/64 inch (0.3906 inch) finished bore diameter — falls within the 0.3500 to 0.3999 inch decimal range
• 6-flute left-hand spiral geometry with right-hand cutting direction reduces chatter and controls chip flow
• High-speed steel (HSS) construction provides toughness across a wide range of workpiece materials
• Bright/uncoated finish — ready to use as supplied, with no coating to alter critical diameter tolerance
• Straight-cylindrical shank fits standard drill chucks and collet systems without an adapter
• 7-inch OAL with 1-3/4-inch flute length provides reach for typical through-hole and moderate-depth applications

Compatibility

Designed as a standard chucking reamer for use in any machine spindle that accepts a straight-cylindrical shank, including drill presses, lathes, knee mills, and CNC machining centers equipped with an appropriate chuck or collet holder.

Installation Notes

A licensed machinist or qualified toolroom technician should mount this reamer in a rigid, accurately running chuck or precision collet to maintain concentricity. Always confirm spindle runout is within acceptable limits before reaming to avoid oversizing the bore. Use a cutting fluid appropriate to the workpiece material to extend tool life and achieve the desired surface finish. Never use a hand-reaming technique with this chucking reamer — it is designed for machine operation only.