Guhring 9003010004200 Micro Drill Bit 0.0165 in Cobalt

Product Description

The GUHRING 9003010004200 is a cobalt micro drill bit engineered for precision drilling in small-diameter applications. Built to DIN 1899 specification, this Series 301 bit measures 0.0165 inches in diameter with an overall length of 0.984 inches. The 118-degree faceted point geometry delivers accurate entry with minimal walking on hard and soft metals alike. A web-thinned, tapered web configuration reduces thrust load at the cutting edge, which matters when drilling at this scale. The spiral flute design promotes efficient chip evacuation in shallow-depth holes. Diameter tolerance is held to +0.000 to -0.004 mm, supporting the tight positional accuracy that micro-machining work demands.

This bit is rated for aluminum as its primary workpiece material, with titanium alloy listed as a secondary application material. The 5xD flute-to-diameter ratio suits short, controlled drilling cycles typical of precision component work. With a maximum drilling depth of 0.093 inches and a straight-cylindrical shank measuring 1.00 mm in diameter, the bit seats securely in standard collet-style micro-drill chucks used on CNC machining centers, drill presses, and precision hand tools. It is sold individually but requires a minimum order quantity of 10 units per order.

Key Features

• Cobalt construction for elevated heat resistance and hardness retention in demanding materials
• 118-degree faceted point with web thinning to reduce thrust and improve centering accuracy
• Bright/uncoated finish maintains true diameter tolerance of +0.000 to -0.004 mm
• Spiral flute, regular spiral type promotes chip clearance in short-depth micro holes
• Straight-cylindrical shank at 1.00 mm diameter for secure collet or chuck retention
• Built to DIN 1899 standard for dimensional consistency across production runs

Compatibility

Designed for use in aluminum and titanium alloy workpieces per material codes K, M, N, P, and S. Fits standard collet chucks and precision drill holders accepting a 1.00 mm straight-cylindrical shank. Suitable for CNC machining centers and precision benchtop drill presses configured for micro-diameter tooling.

Installation Notes

Installation and use should be performed by machinists or tooling technicians familiar with micro-drill practices. Always secure the shank fully in a properly sized collet or drill chuck and verify runout before cutting to avoid bit deflection or breakage at this diameter. Reduce spindle speed and feed rate compared to standard drill bit guidelines when working in titanium alloy. Inspect the cutting edge and point geometry before each use, as micro drill bits at this diameter are susceptible to tip damage from improper storage or handling.