Guhring 9003010012600 Micro Drill Bit 1.26mm Cobalt 118

Product Description

The GUHRING 9003010012600 is a cobalt micro drill bit designed for precision drilling in small-diameter applications. It carries a 1.26 mm cutting diameter (0.0496 inch) and a 118-degree faceted point angle, with a web-thinned, tapered-web configuration that reduces entry force and helps center the bit on contact. The overall length is 25 mm with an 8.50 mm flute length. The straight-cylindrical shank measures 1.50 mm in diameter. Manufactured to DIN 1899 standards, this bit is suited for machinists, tool-and-die shops, and maintenance technicians working with tight-tolerance micro features.

This drill bit is rated for use in aluminum, aluminum alloy, brass, cast iron, hardened materials, nickel alloy, stainless steel, steel, and titanium alloy. Its cobalt construction gives it the heat resistance needed for work-hardening alloys and other demanding materials. Right-hand spiral fluting provides standard chip evacuation. Typical applications include small pilot holes, PCB fixture drilling, medical component work, and precision part manufacturing where a clean, accurately sized hole under 2 mm is required.

Key Features

• 1.26 mm cutting diameter to DIN 1899 specification with a tolerance of +0.000 to -0.004 mm
• Cobalt tool material provides elevated heat resistance for work-hardening and high-temperature alloys
• 118-degree faceted point with web thinning for reduced thrust and accurate self-centering
• Regular right-hand spiral flute for reliable chip removal in through and blind holes
• Bright/uncoated finish for direct use or as a base for additional coating if required
• Straight-cylindrical 1.50 mm shank fits standard micro-drill chucks and collets

Compatibility

Designed as a DIN 1899 Series 301 micro drill bit compatible with standard straight-cylindrical micro-drill chucks and collets accepting a 1.50 mm shank diameter. Rated for primary and secondary workpiece materials including aluminum, aluminum alloy, brass, cast iron, hardened materials, nickel alloy, stainless steel, steel, and titanium alloy.

Installation Notes

Micro drill bits should be installed by a machinist or qualified technician using a precision collet or micro-drill chuck rated for the 1.50 mm shank diameter. Ensure the spindle and work holding are properly secured and the workpiece is clamped firmly before starting the cut. At diameters below 2 mm, feed rates must be carefully controlled to avoid bit deflection or breakage. No coolant-through capability is present on this bit, so external coolant or cutting fluid application is recommended when drilling harder alloys.