Guhring 9055200110000 Drill Bit 0.4331 in Cobalt Stub

Product Description

The GUHRING 9055200110000 is a stub-length cobalt screw machine drill bit designed for high-productivity drilling in metalworking and industrial applications. Built to DIN 1897 standards, this Series 5520 bit measures 11.00 mm (0.4331 inches) in diameter with a straight-cylindrical shank of the same diameter. The 118-degree four-facet split point provides fast penetration and self-centering entry, while the web-thinned, tapered web construction reduces thrust requirements. Right-hand spiral flutes and a 3xD flute-to-diameter ratio support efficient chip evacuation. Licensed machinists and tool room technicians are the primary users of this bit.

This drill bit is suited for stub-length drilling operations where rigidity is critical and a shorter tool overhang is preferred. The cobalt construction handles demanding workpiece materials, with aluminum listed as a primary workpiece material. The bit is appropriate for use in drill presses, CNC machining centers, and manual lathes wherever a screw machine length tool is specified. The maximum drilling depth is 1.2010 inches (30.50 mm), making it well matched to through-hole and moderate-depth blind-hole work in production and maintenance environments.

Key Features

• Cobalt tool material with coating for extended tool life in demanding materials
• 118-degree four-facet split point for self-centering and reduced thrust
• Web-thinned tapered web reduces cutting resistance
• Right-hand cut with regular spiral flutes for consistent chip evacuation
• Built to DIN 1897 specification for dimensional consistency
• Straight-cylindrical shank fits standard drill chucks and collets

Compatibility

Designed as an OEM-style replacement or direct-use stub-length drill bit for applications calling for a DIN 1897 screw machine drill in the 0.4000 to 0.4500 inch (11.00 to 13.50 mm) size range.

Installation Notes

Installation is performed by qualified machinists or tool room technicians. Power down and lock out the machine before changing tooling. Verify chuck or collet concentricity before seating the shank, and confirm the drill is fully engaged and secured before resuming operation. Do not exceed the rated maximum drilling depth of 1.2010 inches without retracting to clear chips.