Harvey Tool 938180-C3 Back Chamfer Cutter 0.08 in 4 Flute

Product Description

The HARVEY TOOL 938180-C3 is a solid carbide back chamfer cutter designed for deburring and chamfering the reverse side of drilled, milled, or bored holes without repositioning the workpiece. The cutter head measures 0.08 inches in diameter with a 90-degree included angle and a 0.014-inch chamfer width. Four flutes provide clean, efficient material removal in a single pass. An AlTiN coating improves heat resistance and extends tool life in harder work materials. This tool mounts on a 1/8-inch shank and has an overall length of 1.5 inches, keeping it compact for tight-clearance applications. It is used by machinists and toolmakers working in precision machining environments.

This back chamfer cutter is suited for CNC machining centers, manual mills, and high-speed spindle applications where back-side edge preparation is required. Typical applications include chamfering cross-holes, back-spotfacing small bores, and breaking sharp edges on the underside of plates or castings. The small cutter head diameter and narrow neck of 0.047 inches allow access to confined bore geometries where standard chamfer tools cannot reach. It is appropriate for use in aerospace, medical device, mold and die, and general precision machining work.

Key Features

• Solid carbide construction for rigidity and wear resistance in demanding materials
• AlTiN coating provides elevated heat resistance and extended tool life
• 0.08-inch cutter head diameter with 0.014-inch chamfer width for fine, controlled back chamfering
• 90-degree included angle produces consistent, standard chamfer geometry
• 4-flute design delivers smooth cutting action and improved surface finish
• 0.047-inch neck diameter allows entry into small-diameter bores and tight clearance zones

Compatibility

Designed as an OEM-style back chamfer cutter compatible with standard 1/8-inch collet systems and tool holders used in CNC and manual milling applications.

Installation Notes

Installation is performed by qualified machinists familiar with small-diameter carbide tooling. Secure the 1/8-inch shank in a compatible collet or tool holder and verify runout before machining to avoid tool breakage at the narrow neck diameter. Power down and lock out the spindle before tool changes. Handle solid carbide tools carefully to prevent chipping from impact or improper clamping pressure.