Guhring 9038990014700 Micro Drill Bit 1.47mm Carbide

Product Description

The GUHRING 9038990014700 is a solid carbide micro drill bit engineered for precision drilling in demanding industrial and machining applications. Built from K40-grade solid carbide and coated with TiAlN for elevated heat resistance and tool life, this bit delivers consistent performance in tight-tolerance operations. The 140-degree faceted point reduces thrust force and improves centering accuracy on entry. With an overall length of 38 mm and a flute length of 10 mm, the bit is designed for controlled, accurate drilling where repeatability and hole quality are critical. It is installed and used by machinists, toolroom technicians, and precision fabricators.

This micro drill bit is suited for drilling cast iron and steel workpieces in CNC machining centers, drill presses, and high-speed spindle applications requiring small-diameter, tight-tolerance holes. The right-hand spiral flute geometry promotes efficient chip evacuation in short-hole drilling cycles. The straight-cylindrical shank with a 3 mm diameter fits standard collet systems. Maximum recommended drilling depth is 7.80 mm, consistent with the 5xD flute-to-diameter ratio of the Series 3899 design.

Key Features

• K40-grade solid carbide construction for rigidity and wear resistance in ferrous materials
• TiAlN coating extends tool life at elevated cutting temperatures
• 140-degree faceted point with web thinning reduces entry thrust and improves self-centering
• Right-hand spiral flute promotes chip clearance in cast iron and steel
• h7 diameter tolerance ensures consistent fit and hole accuracy
• 3 mm straight-cylindrical shank compatible with standard collet and chuck systems

Compatibility

Designed for use in primary workpiece materials including cast iron (material code K) and steel (material code P), within CNC and manual drilling setups accepting a 3 mm straight-cylindrical shank.

Installation Notes

This bit should be installed by qualified machinists familiar with micro-diameter tooling and runout requirements. Ensure the spindle and collet are clean and within tolerance before seating the shank, as micro drill bits are sensitive to runout at small diameters. Power down and lock out the machine before tool changes. Do not exceed the rated maximum drilling depth of 7.80 mm without pecking cycles or additional chip-clearing passes.