Guhring 9055150040000 Carbide Drill Bit 4 Mm Firex

Product Description

The GUHRING 9055150040000 is a solid carbide jobber length drill bit engineered for high-performance drilling in ferrous materials. Built to DIN 6537L standards, this bit features a 140-degree split point (SU type) with web thinning for self-centering entry without a center punch. The FIREX coating reduces friction and extends tool life in demanding applications. At 4 mm in diameter with a 74 mm overall length and a 36 mm flute length, it handles maximum drilling depths up to 30 mm. The submicron carbide grade delivers consistent performance in both interrupted and continuous cuts.

This drill bit is suited for drilling cast iron and steel in production and job-shop environments. The straight-cylindrical shank at 6 mm diameter seats securely in standard drill chucks and collet holders. The 5xD flute-to-diameter ratio and regular spiral geometry promote efficient chip evacuation in through-hole and blind-hole applications. It is appropriate for CNC machining centers and manual drill presses operated by machinists, toolmakers, and metalworking professionals.

Key Features

• Solid submicron carbide construction for rigidity and wear resistance in steel and cast iron
• FIREX coating for reduced friction and extended tool life
• 140-degree SU split point with web thinning for self-centering entry
• Right-hand, regular spiral flutes for efficient chip removal
• Straight-cylindrical 6 mm shank compatible with standard chucks and collet systems
• Manufactured to DIN 6535 and DIN 6537L standards

Compatibility

Designed for use in standard drill chucks and collet holders accepting a 6 mm straight-cylindrical shank. Primary workpiece materials are cast iron (material code K) and steel (material code P) per DIN classification.

Installation Notes

Installation and use should be performed by qualified machinists familiar with tooling setup and safe machine operation. Secure the shank fully in the chuck or collet and verify runout before operation. Always bring spindle speed and feed rate into the range appropriate for carbide tooling in the workpiece material being drilled. Power down and lock out the machine before changing or inspecting the bit.