Guhring 9003010008600 Micro Drill Bit 0.0339 in Cobalt

Product Description

The GUHRING 9003010008600 is a cobalt micro drill bit engineered for precision drilling in small-diameter applications. It measures 0.0339 inches in diameter with an overall length of 0.984 inches and a 118-degree faceted point angle. The cobalt construction delivers heat resistance and edge retention in demanding materials. A spiral flute geometry with web thinning and a tapered web configuration promotes chip evacuation and reduces thrust during entry. The straight-cylindrical shank seats securely in standard collet chucks and drill chucks. This bit is suited for machinists, tool-and-die technicians, and precision fabricators working in tight tolerances.

This micro drill bit is designed for precision work in aluminum and titanium alloy stock, matching material codes K, M, N, P, and S per the product specification. It follows DIN 1899 standards and carries a 5xD flute-to-diameter ratio, providing a maximum drilling depth of 0.185 inches (4.71 mm). The bright, uncoated finish suits applications where coating interaction with workpiece material is a concern. Series 301 construction positions it for high-precision, short-run drilling operations typical in aerospace component work, instrument manufacturing, and fine mechanical assembly.

Key Features

• Cobalt tool material for elevated heat resistance and extended tool life in hard materials
• 118-degree faceted point angle with web thinning for clean entry and reduced walking
• Tapered web configuration improves chip flow and reduces axial thrust
• Right-hand cut spiral flute with 5xD ratio supports efficient chip evacuation
• Bright, uncoated finish — no coating interaction with workpiece material
• DIN 1899 specification for dimensional consistency and interchangeability

Compatibility

Designed for drilling aluminum and titanium alloy workpieces per material codes K, M, N, P, and S. Conforms to DIN 1899. Fits standard collet chucks and drill chucks accepting a 1.50 mm straight-cylindrical shank. Part of GUHRING Series 301.

Installation Notes

Installation and use of this micro drill bit should be performed by qualified machinists or tooling technicians familiar with CNC or manual precision drilling equipment. Secure the straight-cylindrical shank fully in a compatible collet or chuck before operation, and verify runout with a dial indicator when tolerances are critical. Micro-diameter bits are brittle — use appropriate feed rates and spindle speeds for the workpiece material to avoid breakage. Do not use this bit in hammer or impact-mode drilling equipment.