Guhring 9038990015500 Micro Drill Bit 1.55mm Carbide

Product Description

The GUHRING 9038990015500 is a solid carbide micro drill bit engineered for precision drilling in demanding metalworking applications. Built from K40-grade carbide and finished with a TiAlN coating, this bit delivers extended tool life and heat resistance at small diameters. It features a 140-degree faceted point angle with web thinning to reduce thrust and improve centering accuracy. The straight-cylindrical shank measures 3.00 mm in diameter, and the overall length is 38.00 mm. Machinists and toolroom professionals typically install this bit in CNC machining centers, drill presses, and precision bench machines.

This micro drill bit is designed for drilling cast iron and steel workpieces at a diameter of 1.55 mm (0.0610 inches). The flute length is 10.00 mm, supporting a maximum drilling depth of 7.68 mm (0.302 inches), which corresponds to a 5xD flute-to-diameter ratio. The right-hand cutting direction and regular spiral flute geometry make it suited for conventional feed applications in production and toolroom environments. It is sold individually with a minimum order quantity of one.

Key Features

• K40-grade solid carbide construction for rigidity and wear resistance at micro diameters
• TiAlN coating improves heat resistance and extends tool life in ferrous materials
• 140-degree faceted point with web thinning reduces entry thrust and improves hole positioning
• Straight-cylindrical shank at 3.00 mm diameter fits standard collets and drill chucks
• 5xD flute ratio provides adequate chip evacuation at depth without sacrificing rigidity
• h7 diameter tolerance ensures consistent fit and repeatable hole sizing

Compatibility

Designed for drilling cast iron and steel workpieces; primary workpiece material codes K and P per ISO classification. Compatible with machine spindles and collet systems accepting a 3.00 mm straight-cylindrical shank.

Installation Notes

Installation and tool changes should be performed only after the machine spindle has come to a complete stop and the machine is locked out per applicable shop safety procedures. Secure the shank fully in the collet or chuck and verify runout before drilling. At micro diameters, excessive feed rates or lateral force will cause breakage; follow the toolmaker's recommended feed and speed parameters for the workpiece material. Chip evacuation should be monitored closely, particularly at or near maximum drilling depth.