Hertel 79890539 Chucking Reamer Wire 15 Solid Carbide

Product Description

The HERTEL 79890539 is a solid carbide chucking reamer designed for precision hole finishing in metalworking applications. Built to wire gauge size 15, it produces a nominal 0.1800 inch diameter bore with a tight tolerance of 0.0000 to 0.0002 inches, making it well-suited for applications that require close-tolerance fits. The 4-flute straight flute geometry provides smooth chip evacuation and consistent surface finish. The straight cylindrical shank mounts directly in standard drill chucks, collets, or floating holders on mills, lathes, and drill presses. This reamer is used by machinists and tool-room professionals who need repeatable, accurate hole sizing without coating interference, as it ships in a bright uncoated finish.

This reamer is intended for use in precision machining environments where wire size 15 holes require a finished diameter held to tight tolerances. The 2.75 inch overall length and 0.875 inch flute length make it appropriate for shallow-to-moderate depth through-holes and blind holes in ferrous and non-ferrous materials. Typical applications include jig and fixture work, hydraulic component finishing, and general production reaming where solid carbide rigidity outperforms high-speed steel in harder or abrasive workpiece materials. Installation is performed by qualified machinists in shop environments.

Key Features

• Wire size 15 nominal diameter of 0.1800 inches with tolerance of 0.0000 to 0.0002 inches
• Solid carbide construction for superior rigidity and wear resistance versus high-speed steel
• 4-flute straight flute design for smooth cutting action and consistent surface finish
• Straight cylindrical shank compatible with standard chucks, collets, and floating holders
• Bright uncoated finish — no coating variables affecting finished bore diameter
• Right-hand cutting direction for standard machine spindle rotation

Compatibility

Designed as an OEM-style chucking reamer for use in standard drill chucks, collets, or floating reamer holders on lathes, milling machines, and drill presses that accept a straight cylindrical shank.

Installation Notes

Chucking reamers of this type are installed and operated by qualified machinists. Power down and lock out the machine spindle before mounting or removing the reamer. Secure the straight shank firmly in a properly sized collet or chuck to prevent runout, which directly affects bore tolerance and tool life. Use appropriate cutting fluid for the workpiece material, and never exceed the recommended feed rate for carbide tooling, as carbide is brittle and sensitive to interrupted cuts and excessive side loading.