Hertel 72292121 Chucking Reamer Letter L 6 Flute Hss

Product Description

The HERTEL 72292121 is a chucking reamer designed for precision hole finishing in metal machining operations. Built from high-speed steel (HSS) with a bright, uncoated finish, it delivers consistent sizing performance in drill press, lathe, and CNC chucking applications. The reamer measures 0.290 inches in diameter (Letter L designation) with a 4.25-inch overall length and a 1.5-inch straight flute section. Six right-hand flutes provide smooth, controlled material removal, making this tool a practical choice for machinists and toolroom professionals who need accurate, repeatable bore finishing.

This chucking reamer is suited for use in general metalworking environments where Letter L diameter holes require finishing to close tolerances. The straight-cylindrical shank allows direct chucking in standard drill chucks or collet holders without additional adapters. It is appropriate for use in job shops, production machining cells, and maintenance toolrooms working with steel, cast iron, aluminum, and similar machinable materials. Right-hand cutting direction is standard for conventional machine spindle rotation.

Key Features

• Letter L designation corresponds to 0.290 inch reamer diameter
• 6 straight flutes with right-hand cutting direction for smooth bore finishing
• HSS construction provides durability across a range of machinable metals
• Bright, uncoated finish suitable for use with standard cutting fluids
• Straight-cylindrical shank for direct chucking without adapters
• 4.25-inch overall length with 1.5-inch flute length for controlled reach

Compatibility

Designed as a standard chucking reamer for use in drill presses, lathes, and CNC machining centers equipped with drill chucks or collet systems accepting straight-cylindrical shanks in the appropriate diameter range.

Installation Notes

A licensed machinist or qualified toolroom technician should install and operate this reamer. Power down the machine and secure the spindle before mounting or removing the tool from the chuck. Always apply appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish. Ensure the workpiece is clamped securely and the hole is pre-drilled to the correct pilot diameter before reaming.