Guhring 9014520079400 Solid Carbide Jobber Drill 5/16 in

Product Description

The GUHRING 9014520079400 is a solid carbide jobber length drill bit designed for precision hole-making in demanding materials. Built to DIN 6539 standards, this bit measures 5/16 inch (0.3125 inch) in diameter with a 150-degree point angle optimized for self-centering entry. The three-flute spiral configuration with a regular helix and web-thinned, tapered web provides efficient chip evacuation and reduced thrust during drilling. The bright uncoated finish maintains dimensional accuracy on the cutting edge. Submitted material grade is submicron carbide, offering the hardness and wear resistance required when drilling hard steels, cast iron, and other difficult workpiece materials. Licensed machinists, tool-and-die makers, and precision shop technicians are the primary installers.

This bit is suited for production and maintenance drilling applications where a standard jobber length reaches the required depth. The 5xD flute-to-diameter ratio and 1-57/64 inch flute length support drilling to a maximum depth of approximately 1.421 inches. The straight-cylindrical shank fits standard drill chucks and collet holders commonly found on drill presses, CNC machining centers, and hand-held power drills. The self-centering point geometry reduces the need for a center punch on flat or slightly curved surfaces, making it well suited for repetitive-hole production work in shop and field environments.

Key Features

• Solid submicron carbide construction for extended tool life in hard and abrasive materials
• 150-degree self-centering point angle reduces walking and eliminates center-punch steps
• Three-flute spiral design improves chip evacuation versus two-flute alternatives
• Web-thinned tapered web lowers cutting thrust and heat buildup
• Built to DIN 6539 specification for consistent dimensional tolerances (-0.015 to 0.000 mm diameter tolerance)
• Bright uncoated finish provides a stable baseline for re-coating or use as-is

Compatibility

Designed as a DIN 6539 Series 1452 jobber length drill bit with a 5/16 inch straight-cylindrical shank, compatible with any standard drill chuck or collet holder accepting that shank diameter on drill presses, machining centers, or portable power drills.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician following shop safety protocols. Secure the shank fully in the chuck or collet to the recommended engagement depth before running the spindle. Carbide tooling is brittle and susceptible to chipping from side loading or interrupted cuts at improper feed rates — consult applicable cutting data tables for the workpiece material before use. Ensure the machine spindle is at a full stop before changing or inspecting this bit.