Guhring 9038990009100 Micro Drill Bit Wire 64 Carbide

Product Description

The GUHRING 9038990009100 is a solid carbide micro drill bit designed for precision drilling in ferrous metals and cast iron. It features a 140-degree faceted point angle with web thinning for clean entry and reduced thrust, and a TiAlN coating for extended tool life in abrasive and high-heat applications. The bit runs a right-hand spiral flute and carries a straight-cylindrical shank with a shank diameter of 3.00 mm. Overall length is 38.00 mm. This drill is intended for use by machinists and toolroom technicians working to tight tolerances in production or maintenance environments.

This micro drill is suited for precision work in cast iron and steel (material grades K and P). It is appropriate for CNC machining centers, drill presses, and manual operations requiring tight hole geometry. With a 5xD flute-to-diameter ratio and a maximum drilling depth of 8.64 mm (0.3400 inches), it handles moderate-depth micro holes without coolant-through capability, relying on proper chip evacuation technique and compatible cutting fluids applied externally.

Key Features

• Solid carbide construction, material grade K40, for rigidity and wear resistance in micro drilling
• TiAlN coating extends tool life in high-temperature and abrasive cutting conditions
• 140-degree faceted point with web thinning reduces entry thrust and improves hole accuracy
• Right-hand spiral flute promotes chip evacuation in cast iron and steel
• Straight-cylindrical shank, 3.00 mm diameter, compatible with standard collet chucks
• h7 shank diameter tolerance ensures consistent fit and runout control

Compatibility

Designed as an OEM-style replacement and standard production micro drill for use in applications requiring a wire size 64 (0.0358 inch / 0.91 mm) hole diameter, compatible with collet systems accepting a 3.00 mm straight-cylindrical shank.

Installation Notes

Installation and operation should be performed by qualified machinists or toolroom technicians familiar with micro-diameter tooling. Secure the shank fully in a precision collet or drill chuck and verify runout before cutting, as micro drills are sensitive to misalignment. Apply a compatible external cutting fluid for the workpiece material and use appropriate feed and speed settings to avoid drill deflection or breakage. Inspect the drill point for wear or chipping before each use.