Guhring 9055190088400 Cobalt Drill Bit Letter S

Product Description

The GUHRING 9055190088400 is a cobalt steel jobber-length drill bit sized to Letter S (0.3480 inches) with a 118-degree four-facet split-point geometry and a titanium nitride (TiN) coating. Built to DIN 338 standards from M35 cobalt material grade, it delivers improved heat resistance and edge retention compared to standard high-speed steel bits. The straight-cylindrical shank measures 8.84 mm in diameter and seats securely in standard drill chucks. With a regular spiral flute and web-thinned, tapered web design, it reduces entry force and improves chip evacuation. This bit is sold individually and suits drilling professionals who require consistent, repeatable hole quality in production or maintenance environments.

This drill bit is rated for use in aluminum and a range of other workpiece materials including cast iron, non-ferrous metals, and low-alloy steels, as indicated by material codes K, M, N, and P. The flute-to-diameter ratio of 5xD and a maximum drilling depth of 2.667 inches (67.74 mm) make it appropriate for through-hole and moderate-depth applications. The Series 5519 designation places it within a well-defined product family intended for general-purpose machining in both shop and field environments. Licensed machinists, tool-and-die workers, maintenance mechanics, and industrial service technicians are the primary installers.

Key Features

• M35 cobalt steel construction for elevated heat and wear resistance
• TiN coating extends tool life and reduces friction at the cutting edge
• 118-degree four-facet split-point reduces walking and lowers thrust requirements
• Web-thinned tapered web improves chip flow and reduces torque demand
• DIN 338 standard ensures dimensional consistency and interchangeability
• Right-hand cut with regular spiral flute for reliable chip evacuation

Compatibility

Designed as an OEM-style replacement or direct-use drill bit compatible with standard drill chucks and CNC spindles accepting straight-cylindrical shanks. Suitable for use in aluminum (K), heat-resistant alloys (M), non-ferrous metals (N), and carbon or low-alloy steels (P) per material classification codes in the product specification.

Installation Notes

Install in a drill press, CNC machining center, or hand drill with a properly sized chuck before powering on the machine. Secure the straight-cylindrical shank with adequate gripping length to prevent slippage under load. No coolant-through capability is present, so apply cutting fluid externally when drilling steel or heat-sensitive alloys to protect the cutting edge. Follow applicable shop safety standards and ensure workpieces are clamped before initiating the cut.