Guhring 9011830084000 Jobber Drill Bit 8.4mm Carbide

Product Description

The GUHRING 9011830084000 is a jobber-length drill bit engineered for precision drilling in cast iron and steel. Built from submicron solid carbide and coated with titanium nitride (TiN), it delivers extended tool life and thermal resistance under high-cycle production conditions. The 140-degree split point (SU point type) with web thinning promotes self-centering entry and reduces thrust load at the start of the cut. At 8.4 mm (0.3307 inches) in diameter with an overall length of 103 mm, it fits standard CNC machining centers, drill presses, and manual machines equipped with a whistle notch tool holder. This bit is installed and operated by machinists and tool-room technicians in metalworking environments.

This drill bit is suited for ferrous machining applications including structural steel fabrication, cast iron component drilling, and precision hole-making in job shop and production settings. The 5xD flute-to-diameter ratio and regular spiral flute geometry support efficient chip evacuation in deeper holes. Coolant-through capability makes it compatible with high-pressure internal coolant spindles, which is particularly effective when drilling cast iron or alloy steel at elevated feed rates. The DIN 6537L specification governs geometry and tolerance, making it a direct fit for tooling systems built to DIN standards.

Key Features

• Submicron solid carbide substrate for hardness and wear resistance in ferrous materials
• Titanium nitride (TiN) coating reduces friction and extends cutting edge life
• 140-degree SU split point with web thinning for self-centering and reduced entry thrust
• Coolant-through design compatible with internal high-pressure coolant spindles
• Whistle notch shank for secure tool holding and positive anti-pullout retention
• Conforms to DIN 6535 and DIN 6537 L standards for dimensional consistency

Compatibility

Designed for use in tooling systems that accept a whistle notch shank per DIN 6535. Primary workpiece materials are cast iron (material code K) and steel (material code P). Conforms to DIN 6537 L geometry and is part of GUHRING Series 1183.

Installation Notes

Installation should be performed by a qualified machinist familiar with carbide tooling and DIN-standard tool holders. Confirm spindle and holder are free of contamination and that the whistle notch is fully engaged before clamping. Carbide is brittle — avoid lateral loading, interrupted cuts without proper setup, or re-chucking a visibly chipped edge. When using the coolant-through feature, verify internal coolant pressure is within the spindle and holder manufacturer specifications before operation.