Guhring 9038990013000 Micro Drill Bit 1.3mm Carbide Tialn

Product Description

The GUHRING 9038990013000 is a solid carbide micro drill bit designed for precision drilling in demanding metalworking applications. Built to Series 3899 standards, it features a 1.3 mm diameter, a 140-degree faceted drill point, and a TiAlN coating that provides heat resistance and extended tool life at elevated cutting speeds. The straight-cylindrical shank measures 3.0 mm in diameter, offering secure chuck retention in standard collets and drill chucks. Web-thinned geometry reduces thrust force at entry, which is critical when drilling small-diameter holes in hard or abrasive materials. This bit is installed by machinists, tool-and-die makers, and precision fabricators working in CNC machining centers and drill presses.

This micro drill bit is intended for use in cast iron and steel workpieces, covering primary material codes K and P. The 5xD flute-to-diameter ratio and 10.0 mm flute length support a maximum drilling depth of 8.05 mm. Its right-hand spiral flute design ensures efficient chip evacuation in short-to-medium depth holes. Typical applications include precision component drilling, fixture work, and close-tolerance hole production where diameter tolerance to h7 is required. Coolant-through is not supported, so external coolant or cutting fluid application is the standard approach for this tool.

Key Features

• 1.3 mm drill diameter with h7 tolerance for close-tolerance hole production
• TiAlN coating for heat resistance and extended tool life in ferrous materials
• 140-degree faceted point with web thinning to reduce entry thrust force
• Solid carbide construction in K40 material grade for rigidity at small diameters
• Right-hand cut, regular spiral flute for consistent chip evacuation
• 3.0 mm straight-cylindrical shank compatible with standard collets and chucks

Compatibility

Designed for drilling cast iron and steel workpieces (material codes K and P). Fits standard collets, drill chucks, and tool holders accepting a 3.0 mm straight-cylindrical shank. Part of the GUHRING Series 3899 micro drill line.

Installation Notes

Installation and setup should be performed by a qualified machinist familiar with CNC or manual drill press operation. Ensure the spindle is fully stopped and the machine is powered down before loading or changing tooling. Secure the shank fully within the collet or chuck to the recommended grip depth to prevent runout at small diameters. External cutting fluid or coolant is recommended, as this tool does not support coolant-through delivery.