Hertel 2291797 Chucking Reamer Wire 79 Hss Straight Flute

Product Description

The HERTEL 2291797 is a high-speed steel chucking reamer designed to finish-ream small-diameter holes to precise tolerances. Ground to a wire gauge size 79 diameter of 0.0145 inches, this reamer delivers accurate sizing in materials where tight bore finishes are required. The straight flute geometry and right-hand cutting direction make it well-suited for through-hole and blind-hole reaming operations in a drill press, CNC machining center, or manual lathe. With an overall length of 0.75 inches and a flute length of 0.375 inches, it is built for compact work envelopes and fine detail work. The bright, uncoated HSS construction offers good general-purpose cutting performance across ferrous and non-ferrous workpiece materials.

This reamer is intended for precision machining applications requiring accurate hole sizing at the small end of the wire gauge range. Typical use cases include instrument manufacturing, watchmaking, medical device fabrication, electronics assembly fixtures, and any application calling for a finished bore at or near 0.0145 inches. It is compatible with standard drill chucks and collet systems that accept straight-cylindrical shanks. Machinists, toolmakers, and precision shop technicians are the primary users of this tool.

Key Features

• Wire gauge size 79 diameter — 0.0145 inches for precise small-bore finishing
• High-speed steel construction for general-purpose cutting across a range of materials
• Straight flute design supports right-hand cutting with good chip clearance in short-length bores
• Bright, uncoated finish — no added coating that could affect diameter tolerance in tight fits
• Straight-cylindrical shank for compatibility with standard drill chucks and collet holders
• Compact 0.75-inch overall length suited to confined work setups

Compatibility

Designed as an OEM-style chucking reamer for use in standard drill press chucks, CNC tool holders, and lathe tailstock collets accepting straight-cylindrical shanks at this diameter range.

Installation Notes

This tool is installed and operated by machinists and toolroom technicians. Ensure the spindle or chuck is fully de-energized and at a complete stop before inserting or removing the reamer. Use appropriate cutting fluid for the workpiece material to extend tool life and improve bore finish. Do not force the reamer through undersize stock — pilot holes should be drilled close to final diameter before reaming.