Guhring 9003290015900 Cobalt Stub Drill Bit 1/16 Inch

Product Description

The GUHRING 9003290015900 is a cobalt screw machine length (stub) drill bit designed for high-performance drilling in tough materials. Built to DIN 1897 standards, it features a 130-degree point angle with cone relief geometry and a web-thinned parallel web configuration for reduced thrust and improved chip evacuation. The 1/16 inch (0.0625 inch) diameter and 1.339 inch overall length make it well suited for tight-clearance drilling applications where a standard jobber-length bit would be impractical. Right-hand cutting with a regular spiral flute pattern, this bit is used by machinists, maintenance technicians, and fabrication pros working in production and repair environments.

This stub-length drill bit is designed for drilling in steel, stainless steel, cast iron, and high-temperature alloys. Its short overall length improves rigidity and reduces deflection in screw machine setups, CNC drilling operations, and manual drill press work where precision entry is critical. The straight-cylindrical shank fits standard drill chucks without modification. The Series 329 designation identifies it within the GUHRING stub-length cobalt line, making it straightforward to reorder within that family.

Key Features

• Cobalt tool material for durability in steel, stainless steel, cast iron, and high-temp alloys
• 130-degree point angle with cone relief for self-centering entry and reduced walking
• Web-thinned parallel web reduces axial thrust during drilling
• Stub (screw machine) length improves rigidity and minimizes deflection
• Right-hand, regular spiral flute pattern for efficient chip clearing
• Bright/uncoated finish — no coating buildup to affect dimensional tolerance
• Meets DIN 1897 standard for stub-length drill geometry

Compatibility

Designed as an OEM-style screw machine drill bit suitable for use in drill presses, CNC machining centers, and screw machine setups requiring a 1/16 inch straight-shank stub drill conforming to DIN 1897.

Installation Notes

Installation is performed by machinists or maintenance technicians using a standard drill chuck or collet sized for a 0.0625 inch straight shank. Ensure the drill press or machine spindle is fully stopped and locked out before inserting or removing the bit. Verify chuck runout is within acceptable limits before use, as small-diameter bits are sensitive to spindle misalignment. Do not exceed the maximum drilling depth of 0.300 inch (7.62 mm) per pass without retracting to clear chips.