Guhring 9038990020500 Micro Drill Bit 2.05 Mm Carbide

Product Description

The GUHRING 9038990020500 is a solid carbide micro drill bit designed for precision drilling in demanding industrial and machining applications. Built to Series 3899 specifications, it features a 2.05 mm diameter, a 140-degree faceted point, and a TiAlN coating that extends tool life by reducing heat buildup and wear at the cutting edge. The spiral flute geometry promotes efficient chip evacuation, while the web-thinned point reduces entry force and improves centering accuracy. With an overall length of 38 mm and a flute length of 12 mm, this bit is sized for tight-tolerance micro-drilling operations. It is installed and used by machinists, toolroom technicians, and precision fabrication professionals.

This drill bit is engineered for use in cast iron and steel workpieces, making it well suited for CNC machining centers, drill presses, and precision hand-held drilling fixtures where small-diameter, high-accuracy holes are required. The straight-cylindrical shank measures 3 mm in diameter and seats securely in standard collet chucks and drill chucks. The right-hand cut direction and regular spiral type are consistent with conventional spindle rotation setups found in most production and job-shop environments.

Key Features

• 2.05 mm cutting diameter with h7 diameter tolerance for close-fit hole accuracy
• 140-degree faceted drill point with web thinning for reduced thrust and improved self-centering
• TiAlN coating provides heat and wear resistance in ferrous materials
• Solid carbide construction in material grade K40 for rigidity and edge retention
• Spiral flute design with 5xD flute-by-diameter ratio supports chip clearance in deeper holes
• Maximum drilling depth of 8.93 mm supports through and blind-hole applications

Compatibility

Designed for drilling cast iron and steel workpieces; compatible with standard collet chucks and drill chucks accepting a 3 mm straight-cylindrical shank.

Installation Notes

This drill bit should be installed by a qualified machinist or toolroom technician familiar with micro-diameter carbide tooling. Always power down and lock out the spindle before changing tooling. Carbide drill bits are brittle and should not be subjected to side loads or used in worn or loose tool holders. Verify runout at the shank before use, as excessive runout accelerates breakage in small-diameter carbide tools.