Guhring 9003010011200 Micro Drill Bit 1.12mm Cobalt

Product Description

The GUHRING 9003010011200 is a cobalt micro drill bit engineered for precision drilling in small-diameter applications. Built to DIN 1899 specification, it features a 1.12 mm (0.0441 inch) diameter with a straight-cylindrical shank measuring 1.50 mm in diameter. The 118-degree faceted point with web thinning and tapered web configuration reduces entry force and improves centering accuracy. The right-hand spiral flute design promotes chip evacuation in short, controlled cuts. Overall length is 25 mm with a flute length of 7.60 mm. This bit is intended for machinists, toolroom technicians, and precision fabricators working with small-bore drilling operations.

This micro drill bit is suited for drilling aluminum and titanium alloys, as indicated by its primary and secondary workpiece material ratings. The 5xD flute-to-diameter ratio and a maximum drilling depth of 5.92 mm (0.233 inch) make it appropriate for shallow, precise holes in thin-section components and close-tolerance parts. It performs in both manual and CNC drilling setups where fine hole diameters and tight tolerances are required. The bright uncoated finish is compatible with lubricated cutting conditions commonly used when working nonferrous and light alloy materials.

Key Features

• 1.12 mm (0.0441 inch) drill diameter with a diameter tolerance of +0.000 to -0.004 mm
• Cobalt tool material for heat resistance and edge retention in hard and abrasive workpiece materials
• 118-degree faceted point with web thinning for reduced thrust and improved hole entry
• Right-hand spiral flute with tapered web configuration for consistent chip flow
• Straight-cylindrical shank at 1.50 mm diameter for standard collet and chuck mounting
• Built to DIN 1899 specification, Series 301

Compatibility

Designed as a DIN 1899 Series 301 micro drill bit rated for primary use in aluminum (material codes K, M, N, P) and secondary use in titanium alloy (material code S). Fits standard collets and chucks accepting a 1.50 mm straight-cylindrical shank.

Installation Notes

Installation and use of this micro drill bit should be performed by a qualified machinist or toolroom technician familiar with small-diameter tooling. Secure the 1.50 mm shank firmly in a collet or drill chuck rated for the shank diameter before operation. Use appropriate cutting fluid or lubricant for the workpiece material to extend tool life and maintain tolerance. Inspect the cutting edge under magnification before and after use, as micro drill bits are susceptible to chipping at this diameter range.