Guhring 9085210068000 Jobber Drill Bit 6.8mm Carbide

Product Description

The GUHRING 9085210068000 is a jobber-length solid carbide drill bit engineered for high-performance drilling in demanding materials. Coated with nano-SI for extended tool life and heat resistance, it features a 140-degree drill point angle optimized for self-centering entry without a center punch. The bit measures 6.8 mm in diameter with a 91 mm overall length and a straight-cylindrical shank of 8 mm diameter. With a 2-flute spiral configuration and web-thinned geometry, it clears chips efficiently and reduces thrust load. Licensed HVAC, plumbing, and mechanical contractors working with structural and exotic alloys rely on this geometry for clean, accurate through-holes in tight tolerances.

This drill bit is designed for machining titanium alloys and similar high-strength workpiece materials classified under material codes P and S. The self-centering point type (HF) suits production environments where secondary spotting operations are undesirable. Coolant-through capability supports higher feed rates and longer tool life in deep-hole applications up to 42.80 mm maximum drilling depth. The Series 8521 designation follows DIN 6535 and DIN 6537 L standards, making it a recognized specification in precision machining and fabrication shops. A 5xD flute-to-diameter ratio provides the reach typical of jobber-length tooling in general and structural applications.

Key Features

• Solid carbide construction with nano-SI coating for heat and wear resistance
• 140-degree HF self-centering point eliminates spotting operations
• Coolant-through design supports elevated feed rates and extended tool life
• Web-thinned geometry reduces axial thrust and improves chip evacuation
• Straight-cylindrical 8 mm shank compatible with standard drill chucks and collets
• Meets DIN 6535 and DIN 6537 L standards for dimensional consistency

Compatibility

Designed for drilling titanium alloys and high-strength materials in the 6.00 to 7.00 mm diameter range. Fits standard straight-shank drill chucks and ER collet systems accepting an 8 mm shank. Conforms to DIN 6535 and DIN 6537 L specifications.

Installation Notes

This tooling is installed and operated by machinists, toolroom technicians, or mechanical fabricators using CNC machining centers, drill presses, or manual mills with appropriate spindle speed and feed controls. Always ensure the coolant-through supply is active before engaging the workpiece to prevent premature coating failure. Secure the shank fully within the collet or chuck to the recommended grip length before operation. Do not exceed the 42.80 mm maximum drilling depth without retracting to clear chips.