Guhring 9003360079400 Taper Length Drill Bit 5/16 in Cobalt

Product Description

The GUHRING 9003360079400 is a cobalt taper length drill bit engineered for demanding metal-cutting applications in production and maintenance environments. It carries a 5/16 inch (0.3125 inch) diameter with a 130-degree split point, a parabolic flute geometry, and a web-thinned tip to reduce entry thrust and improve chip evacuation. The bright/uncoated finish suits applications where coating buildup is a concern. Right-hand cut, cylindrical shank, and DIN 340 construction make it a shop-ready tool for machinists, tool-and-die professionals, and industrial maintenance technicians.

This drill bit is designed for taper length drilling in materials that challenge standard high-speed steel tooling. Rated material applications include cast iron, hardened materials, stainless steel, and steel. The parabolic flute with a 10xD flute-to-diameter ratio supports deeper hole drilling with improved chip clearing, making it well suited for through-holes in heavy plate, structural steel, and stainless fabrication. It fits standard drill chucks accepting a 5/16 inch cylindrical shank.

Key Features

• Cobalt tool material provides elevated heat resistance for stainless steel and hardened material drilling
• 130-degree standard point angle reduces walking and improves penetration on hard alloys
• Parabolic flute geometry with 10xD ratio promotes efficient chip evacuation in deep-hole applications
• Web-thinned, parallel web configuration lowers thrust requirements at entry
• Bright/uncoated finish — no coating delamination risk in abrasive or corrosive materials
• DIN 340 specification ensures dimensional consistency for precision fitment

Compatibility

Designed as an OEM-specification taper length drill bit per DIN 340 Series 336, compatible with material applications including cast iron, hardened materials, stainless steel, and steel. Accepts any standard drill chuck sized for a 5/16 inch cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists or industrial maintenance technicians familiar with rotary cutting tool safety. Secure the cylindrical shank fully in the drill chuck before operation, and verify chuck runout is within acceptable tolerance to preserve hole accuracy and tool life. Always use appropriate cutting fluid or coolant for the workpiece material, particularly when drilling stainless steel or hardened alloys. Follow applicable shop safety standards and machine manufacturer guidelines when setting spindle speed and feed rate.