Guhring 9038990005000 Micro Drill Bit 0.5mm Solid Carbide

Product Description

The GUHRING 9038990005000 is a solid carbide micro drill bit designed for precision drilling in demanding metalworking applications. Built to Series 3899 standards, this bit features a 0.5 mm diameter with a h7 tolerance, a 140-degree faceted point, and a TiAlN coating that extends tool life in high-heat cutting conditions. The straight-cylindrical shank measures 3.0 mm in diameter, and the overall length is 38.0 mm. Web thinning reduces thrust force and improves chip evacuation in small-diameter holes. This tool is intended for use by machining professionals and toolroom technicians working in tight-tolerance environments.

This micro drill bit is suited for drilling cast iron and steel in production and precision machining settings. The 5xD flute-to-diameter ratio supports a maximum drilling depth of 6.25 mm. The spiral flute geometry promotes consistent chip removal during right-hand cutting operations. Typical applications include component manufacturing, fixture work, and any operation requiring repeatable, accurate small-diameter holes in ferrous materials. No coolant-through capability is present, so external coolant or cutting fluid should be used as appropriate for the workpiece material.

Key Features

• Solid carbide construction in material grade K40 for hardness and wear resistance
• TiAlN coating reduces heat buildup and extends tool life in steel and cast iron
• 140-degree faceted point with web thinning for reduced thrust and accurate entry
• h7 diameter tolerance for consistent, repeatable hole sizing
• 5xD flute ratio supports up to 6.25 mm maximum drilling depth
• Straight-cylindrical 3.0 mm shank for standard collet or chuck compatibility

Compatibility

Designed for use in standard 3.0 mm straight-cylindrical collets or chucks on CNC machining centers, drill presses, and precision drilling stations. Primary workpiece materials are cast iron and steel.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and the machine in a safe, locked-out state. Confirm collet or chuck runout is within acceptable limits before use, as excessive runout accelerates wear and can cause breakage in small-diameter carbide tooling. Do not exceed the maximum drilling depth of 6.25 mm. Apply external cutting fluid appropriate to the workpiece material when coolant-through is not available.