Hertel 72297260 Chucking Reamer Letter Z Hss 6 Flute

Product Description

The HERTEL 72297260 is a high-speed steel (HSS) chucking reamer designed to finish-ream holes to a precise Letter Z diameter of 0.4130 inches. Built with 6 spiral flutes in a right-hand cutting and right-hand spiral configuration, it delivers smooth, accurate bore finishing in metalworking operations. The straight-cylindrical shank seats securely in standard drill chucks or collet holders. At 5.25 inches overall length with a 1.75-inch flute length, this reamer is suited for through-hole and blind-hole finishing in ferrous and non-ferrous materials. It arrives bright and uncoated, ready for use with standard cutting fluids. Machinists and tool-and-die tradespeople use this reamer for production and maintenance applications requiring tight hole tolerances.

This chucking reamer is appropriate for machine shop, maintenance, and repair operations where letter-size reamed holes are required. It fits standard CNC machining centers, drill presses, and manual lathes equipped with a chuck or collet capable of gripping a straight-cylindrical shank. The Letter Z designation targets a 0.4130-inch nominal diameter, falling within the 0.4000 to 0.4999-inch decimal inch range, making it a common choice when reaming holes for close-tolerance pin fits, bushing installation, or precision alignment work in steel, cast iron, aluminum, and similar materials.

Key Features

• Letter Z diameter — 0.4130 inches nominal for precise hole sizing
• 6 right-hand spiral flutes for smooth cutting action and efficient chip evacuation
• High-speed steel (HSS) construction for durability across a range of workpiece materials
• Straight-cylindrical shank for compatibility with drill chucks and collet holders
• Bright, uncoated finish — ready for use with standard cutting lubricants
• Right-hand cutting direction for conventional machine reaming setups

Compatibility

Designed as a standard chucking reamer for use in drill presses, lathes, and CNC machining centers equipped with a chuck or collet holder accepting a straight-cylindrical shank of the appropriate diameter.

Installation Notes

Installation and use of this reamer should be performed by a qualified machinist familiar with metal cutting operations. Ensure the machine spindle is fully stopped and locked out before mounting or removing the tool from the chuck or collet. Apply an appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish. Never exceed the recommended feed and speed parameters for HSS tooling in the relevant workpiece material — refer to standard machining data references for Letter Z reamer operating conditions.