Guhring 9006590107200 27/64 in Cobalt Stub Drill Bit

Product Description

The GUHRING 9006590107200 is a stub-length (screw machine length) cobalt drill bit designed for high-performance drilling in demanding materials. Built to DIN 1897 standards, it features a 27/64 inch (0.4200 inch) diameter, a 130-degree split point, and a parabolic flute geometry that promotes efficient chip evacuation. The web-thinned, parallel-web construction reduces thrust and improves centering on entry. This is a heavy-duty grade bit intended for use by machinists, tool-and-die professionals, and maintenance technicians who regularly work with tough alloys and require a reliable, short-body drill for close-quarters or production drilling applications.

This drill bit is suited for drilling titanium alloys and similarly difficult-to-machine materials where standard HSS tooling underperforms. The stub-length body provides added rigidity, reducing deflection during drilling. The right-hand cut, straight-cylindrical shank fits standard drill chucks and collet holders without modification. It is appropriate for CNC machining centers, drill presses, and hand-held air or electric drills in industrial and job-shop environments. The 3xD flute-to-diameter ratio and parabolic flute form support deeper hole entry relative to the stub body.

Key Features

• 27/64 inch diameter with a tight tolerance of +0.000 to -0.027 mm for accurate hole sizing
• 130-degree drill point angle with standard point type for reduced thrust and self-centering entry
• Parabolic flute geometry for fast, efficient chip removal in tough alloys
• Web-thinned, parallel-web construction lowers cutting resistance
• Cobalt tool material rated for heavy-duty service in titanium alloy and similar workpiece materials
• Conforms to DIN 1897 specification for stub-length drill geometry

Compatibility

Designed as a DIN 1897 stub-length replacement drill bit for applications requiring a 27/64 inch diameter hole in titanium alloys and other hard materials. Fits any standard drill chuck or collet accepting a straight-cylindrical shank at this diameter.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or maintenance technicians familiar with proper cutting tool practices. Ensure the drill chuck or collet is fully tightened and the workpiece is securely clamped before operation. Power down the machine completely before inserting or removing the bit. Do not exceed the rated maximum drilling depth of 1.217 inches (30.92 mm) in a single pass without retracting to clear chips.