Harvey Tool EFG0465-C6 Micro Drill Bit No. 56 Carbide

Product Description

The HARVEY TOOL EFG0465-C6 is a solid carbide micro drill bit engineered for precision drilling in hardened steel applications. Built to a No. 56 wire gauge diameter of 0.0465 inches, this drill features a 140-degree point angle optimized for entry accuracy and reduced thrust in tough materials. The AlTiN Nano coating provides high heat resistance and extended tool life when cutting abrasive or work-hardened workpieces. With a spiral flute design and right-hand cutting direction, it delivers efficient chip evacuation in deep micro-holes. Licensed HVAC, plumbing, and metalworking shops, as well as tool-and-die professionals, rely on this geometry for tight-tolerance bores in hardened components.

This drill bit is part of the Harvey Tool Miniature High Performance Drills - Hardened Steels series, designed specifically for use in hardened steel workpieces. It is suited for CNC machining centers, drill presses, and high-speed spindle applications where micro-diameter precision is critical. The h6 shank diameter tolerance ensures consistent runout and accurate seating in collet-style toolholders. Typical applications include mold and die work, aerospace components, and precision mechanical assemblies requiring small-diameter holes in materials with elevated hardness ratings.

Key Features

• No. 56 wire gauge diameter at 0.0465 inches for micro-precision boring
• 140-degree point angle reduces thrust and improves entry accuracy in hardened materials
• AlTiN Nano coating resists heat buildup and wear during high-speed cutting
• Solid carbide construction maintains rigidity and edge integrity at small diameters
• Spiral flute geometry promotes chip evacuation in deep micro-holes
• h6 shank diameter tolerance provides low runout for accurate collet mounting

Compatibility

Designed as part of the Harvey Tool Miniature High Performance Drills - Hardened Steels series, this drill bit is intended for use in hardened steel as both the primary and secondary workpiece material. Compatible with collet-style toolholders accepting a 3.00 mm shank diameter.

Installation Notes

Installation and use of this micro drill bit should be performed by qualified machinists or tooling technicians familiar with CNC or precision manual drilling equipment. Ensure the spindle and collet are clean and within runout tolerance before seating the 3.00 mm shank to avoid premature tool breakage at this diameter. Use appropriate cutting speeds and feeds for the hardness rating of the workpiece material, and apply cutting fluid or coolant as recommended for carbide tooling in hardened steels. Do not exceed the tool's rated flute depth when drilling blind holes.