Hertel 79890943 Chucking Reamer Wire 61 Solid Carbide

Product Description

The HERTEL 79890943 is a solid carbide chucking reamer in wire gauge size 61, with a decimal diameter of 0.0390 inches. It is designed for precision hole finishing in metalworking and machining applications. The four-flute straight configuration and bright uncoated carbide construction deliver consistent sizing and smooth finish on through-holes and blind bores. With an overall length of 1.5 inches and a flute length of 0.25 inches, this is a compact tool built for small-diameter reaming where tight tolerances are required. It features a straight cylindrical shank for use in standard chucks and collets on drill presses, lathes, and CNC machining centers. Diameter tolerance is held to 0.0000 to 0.0002 inches, making it suitable for close-fit bore work.

This reamer is used in precision machining environments where wire gauge sized holes must be brought to final dimension with repeatable accuracy. It is a right-hand cutting tool appropriate for ferrous and non-ferrous materials where solid carbide tooling is preferred over high-speed steel for wear resistance and edge retention. Typical applications include fixture work, instrument manufacturing, and component production requiring controlled bore diameters in the sub-0.05-inch range. Machinists and tool-and-die professionals will find this tool suitable for both production and maintenance machining work.

Key Features

• Solid carbide construction for superior wear resistance and edge retention
• Wire gauge size 61 with 0.0390 inch decimal diameter
• Four straight flutes for smooth cutting and consistent chip evacuation
• Diameter tolerance of 0.0000 to 0.0002 inches for precision bore sizing
• Bright uncoated finish compatible with a wide range of materials
• Straight cylindrical shank fits standard chucks and collets

Compatibility

Designed as an OEM-style chucking reamer for use in standard drill chucks, collet chucks, and machine spindles accepting straight cylindrical shanks in the appropriate diameter range.

Installation Notes

This tool is installed and operated by machinists on drill presses, lathes, or CNC machining centers. Secure the shank firmly in a collet or drill chuck before use and verify runout is within acceptable limits for the required bore tolerance. Ensure the workpiece is securely clamped and the hole has been pre-drilled to the appropriate undersize before reaming. Use appropriate cutting fluid for the workpiece material to extend tool life and improve finish quality.