Hertel 79888939 Chucking Reamer 0.057 in Solid Carbide

Product Description

The HERTEL 79888939 is a solid carbide chucking reamer designed for precision hole finishing in machining applications. With a 0.057-inch diameter and a tight tolerance of 0.0000 to 0.0002 inches, this reamer delivers accurate, consistent bore sizes in a single pass. The bright, uncoated solid carbide construction provides rigidity and wear resistance suited for small-diameter work. A 4-flute straight flute design and right-hand cutting direction support smooth chip evacuation and stable cutting action. Overall length is 1.5 inches with a flute length of 0.375 inches. Machinists and tool-and-die professionals install this reamer in CNC machining centers and drill presses using a standard chuck or collet.

This reamer is intended for precision hole reaming in metal fabrication, mold making, tooling, and general machining where tight bore tolerances are required. The straight cylindrical shank allows direct chucking in standard drill chucks or collet holders without specialized adapters. Its small diameter makes it well suited for finishing holes in the 0.05 to 0.0999-inch range, including dowel pin clearance holes and precision fit bores in ferrous and non-ferrous materials.

Key Features

• Solid carbide construction provides superior rigidity and tool life in small-diameter reaming
• Diameter tolerance of 0.0000 to 0.0002 inches ensures precise bore sizing
• 4-flute straight flute geometry supports smooth cutting action and efficient chip removal
• Bright, uncoated finish is suitable for use with a wide range of cutting fluids
• Straight cylindrical shank is compatible with standard drill chucks and collet systems
• Right-hand cutting direction for conventional spindle rotation

Compatibility

Designed as an OEM-style chucking reamer for use in standard drill presses, CNC machining centers, and manual mills equipped with a compatible chuck or collet that accepts a straight cylindrical shank.

Installation Notes

Installation is performed by qualified machinists following standard machine shop practices. Always bring the machine spindle to a complete stop before mounting or removing the reamer. Secure the straight shank firmly in a drill chuck or collet to the appropriate clamping specification for the toolholder being used. Apply a suitable cutting fluid for the workpiece material to extend tool life and maintain bore finish quality.