Guhring 9012420063500 Carbide Drill Bit 0.25 in

Product Description

The GUHRING 9012420063500 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding industrial and trade applications. The bit measures 0.25 inches (1/4 inch, Letter E) in diameter with a 140-degree split point (SU type) that reduces walking and improves entry accuracy. A web-thinned, parallel web configuration lowers thrust requirements and extends tool life. This is a right-hand, spiral flute design with a straight-cylindrical shank, built to DIN 6539 standards. Machinists, tool-and-die shops, and maintenance technicians working with cast iron or steel specify this bit for its submicron carbide grade and consistent dimensional tolerance.

This drill bit is suited for screw machine operations and general-purpose precision drilling in ferrous materials, specifically cast iron and steel. The 3xD flute-to-diameter ratio and regular spiral geometry support efficient chip evacuation in short-hole drilling cycles. The straight-cylindrical shank seats directly in standard drill chucks and collet systems without modification. It is a single-piece solid carbide construction with a coated finish for added surface hardness and lubricity.

Key Features

• Solid submicron carbide construction for extended tool life in ferrous materials
• 140-degree SU point with web thinning for reduced thrust and accurate entry
• Coated finish improves surface hardness and reduces heat buildup
• DIN 6539 specification compliance ensures dimensional consistency
• Maximum drilling depth of 0.846 inches (21.48 mm) with 3xD flute ratio
• Right-hand cut, regular spiral flute for efficient chip removal

Compatibility

Designed as a screw machine length drill bit per DIN 6539 for use in cast iron and steel workpieces. Primary workpiece materials listed are cast iron and steel. Compatible with standard drill chucks and collet systems accepting a 6.35 mm straight-cylindrical shank.

Installation Notes

This bit is installed by machinists and tool-and-die technicians in drill presses, CNC machining centers, and screw machines. Ensure the machine spindle is fully stopped and de-energized before changing tooling. Secure the shank fully in the collet or chuck to the recommended grip depth before operation. Coolant-through is not supported on this bit; use appropriate external flood or mist cooling when drilling steel at elevated speeds.