Harvey Tool CHT0292-C3 Micro Drill Bit 0.0292 in Carbide

Product Description

The HARVEY TOOL CHT0292-C3 is a solid carbide micro drill bit designed for precision drilling in prehardened mold steels and similarly hard ferrous materials. Built to wire gauge No. 69 with a decimal diameter of 0.0292 inches, this bit carries a 140-degree drill point angle optimized for hard material entry and reduced walking on tight-tolerance work. The AlTiN coating adds surface hardness and thermal resistance, extending tool life in demanding cutting conditions. With an overall length of 50.00 mm and a spiral flute design, it suits high-RPM spindle applications where small-diameter accuracy is critical.

This drill bit is part of the Miniature High Performance Drills - Prehardened Steels series, built for machinists and toolmakers working in mold and die applications, precision component manufacturing, and tight-tolerance production environments. It is particularly suited for CNC machining centers and precision drill presses where repeatable hole geometry in hardened workpiece materials is required. The right-hand cutting direction and h6 shank tolerance ensure consistent chuck engagement and minimal runout in close-tolerance toolholding systems.

Key Features

• Wire gauge No. 69 diameter — 0.0292 inches — for micro-scale precision drilling
• 140-degree drill point angle engineered for hard material penetration and accurate hole location
• AlTiN coating provides elevated heat resistance and extended tool life in hardened steels
• Solid carbide construction delivers rigidity and wear resistance in abrasive workpiece materials
• Spiral flute geometry promotes chip evacuation in deep or blind-hole applications
• h6 shank diameter tolerance ensures precise fitment in collet and toolholder systems

Compatibility

Designed for use in prehardened mold steels as the primary workpiece material, consistent with the Miniature High Performance Drills - Prehardened Steels series designation. Suitable for CNC machining centers and precision drill presses accepting a 3.00 mm shank diameter with h6 tolerance toolholding.

Installation Notes

Installation and operation of this tool should be performed by qualified machinists familiar with small-diameter carbide tooling. Power down and lock out the spindle before mounting or removing the bit. Use a precision collet or toolholder rated for the 3.00 mm shank to minimize runout — standard drill chucks are not recommended for carbide micro drills at this diameter. Carbide is brittle; avoid side loads, interrupted cuts without appropriate feed reduction, and any impact that could chip the cutting edge.