Guhring 9012420059500 Screw Machine Drill Bit 0.2344in

Product Description

The GUHRING 9012420059500 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding metalworking applications. Built to DIN 6539 standards, this bit features a 140-degree split point (SU type) with web thinning to reduce entry force and improve hole accuracy. The submicron carbide grade and coated finish extend tool life when cutting through tough ferrous materials. At 0.2344 inches (15/64 inch) in diameter, it handles precise holes in production environments where consistency and tool longevity are critical. Machinists and toolroom professionals rely on this series for accurate, repeatable results in CNC and manual drilling operations.

This drill bit is suited for production machining, job shop work, and toolroom applications involving cast iron and steel workpieces. The screw machine length format provides added rigidity compared to jobber-length bits, making it well suited for short-reach setups on machining centers, drill presses, and turret lathes. The straight-cylindrical shank seats directly in standard drill chucks and collet holders without modification. The 3xD flute-to-diameter ratio and regular spiral flute geometry support efficient chip evacuation at moderate cutting depths.

Key Features

• Solid carbide construction with submicron carbide grade for extended tool life in ferrous materials
• 140-degree SU split point with web thinning reduces thrust force and improves self-centering
• Coated finish enhances wear resistance and reduces heat buildup at the cutting edge
• Screw machine length provides greater rigidity than jobber-length bits for close-tolerance drilling
• DIN 6539 specification ensures dimensional consistency and interchangeability
• Straight-cylindrical shank compatible with standard chucks and collet systems

Compatibility

Designed as an OEM-specification replacement or direct-fit tooling option for applications requiring a 0.2344 inch (15/64 inch) diameter screw machine length drill bit with a straight-cylindrical shank, conforming to DIN 6539 standards. Primary workpiece materials listed by the manufacturer are cast iron and steel.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists familiar with proper toolholding practices and cutting parameters for solid carbide tooling. Ensure the spindle and chuck are powered down and locked out before seating or removing the bit. Solid carbide is brittle compared to high-speed steel — avoid side loading, interrupted cuts without appropriate feed rate adjustments, or using worn or out-of-true chucks that introduce runout. Coolant-through is not supported on this bit; apply external coolant or cutting fluid as appropriate for the workpiece material.