Guhring 9038990013200 Micro Drill Bit Size 55 Carbide

Product Description

The GUHRING 9038990013200 is a solid carbide micro drill bit designed for precision drilling in demanding metalworking applications. It carries a wire gauge size of 55, equivalent to 1.32 mm (0.0520 inches) in diameter, with a 140-degree faceted point angle that promotes accurate entry and reduced thrust. The TiAlN coating improves heat resistance and extends tool life in abrasive materials. At 38 mm overall length with a 10 mm flute length, this bit is built for tight, controlled micro-bore work. A web-thinned design reduces cutting forces at the tip. Licensed HVAC, plumbing, and electrical tradespeople, as well as precision machinists, rely on tooling at this tolerance level for consistent results.

This micro drill bit is suited for drilling cast iron and steel in both production and maintenance environments. The straight-cylindrical shank at 3.00 mm diameter seats securely in standard collet chucks and drill chucks sized for that shank diameter. The 5xD flute-to-diameter ratio supports chip evacuation in deeper bores up to 8.02 mm (0.3160 inches) maximum drilling depth. It is a Series 3899 tool manufactured to h7 diameter tolerance, making it appropriate for close-tolerance hole work where fit and finish matter.

Key Features

• Solid carbide construction in material grade K40 for rigidity and wear resistance in ferrous materials
• TiAlN coating for elevated heat resistance and extended tool life
• 140-degree faceted point angle with web thinning to reduce entry thrust and improve centering
• Spiral flute with regular spiral type promotes consistent chip evacuation
• Straight-cylindrical 3.00 mm shank fits standard collet and drill chuck systems
• h7 diameter tolerance ensures close-fit hole accuracy

Compatibility

Designed as a direct-fit replacement or standard tooling addition for applications requiring a wire size 55 (1.32 mm) micro drill bit in cast iron or steel workpieces. Compatible with drill chucks and collet systems accepting a 3.00 mm straight-cylindrical shank.

Installation Notes

This tool is installed by machinists or skilled tradespeople using appropriate collet chucks or drill chucks rated for the 3.00 mm shank diameter. Ensure the spindle is fully stopped and the machine is de-energized before changing tooling. Run at manufacturer-recommended speeds and feeds for solid carbide tooling in the target workpiece material. Do not exceed the maximum drilling depth of 8.02 mm per pass without retracting to clear chips.