Guhring 9055110086000 Carbide Jobber Drill Bit 8.6mm

Product Description

The GUHRING 9055110086000 is a solid carbide jobber-length drill bit engineered for high-performance drilling in demanding metalworking applications. Built from submicron-grade solid carbide and finished with a FIREX coating, this bit is designed to maintain edge life and dimensional accuracy under aggressive cutting conditions. It features a 140-degree split point (SU geometry) with web thinning for self-centering entry, eliminating the need for a center punch on most setups. The straight-cylindrical shank measures 0.3937 inches in diameter, and the overall length is 4.055 inches. With coolant-through capability and a regular spiral flute design, this bit supports through-tool coolant delivery for heat management during deep-hole operations.

This drill bit is intended for professional machinists and toolroom technicians working with cast iron and steel workpieces. It fits CNC machining centers, drill presses, and manual lathes equipped for straight-shank tooling. The 5xD flute-to-diameter ratio and a maximum drilling depth of 1.894 inches (48.1 mm) make it well suited for medium-depth production drilling. It conforms to DIN 6537L and DIN 6535 standards, placing it within a recognized European precision tooling specification commonly specified in aerospace, automotive, and general metalworking shops.

Key Features

• Submicron-grade solid carbide construction for superior hardness and wear resistance in ferrous materials
• FIREX coating extends tool life and reduces built-up edge when drilling cast iron and steel
• 140-degree SU point geometry with web thinning enables self-centering entry without spot drilling
• Coolant-through design supports internal coolant delivery to the cutting zone
• Right-hand cut, regular spiral flute with tapered web for efficient chip evacuation
• Conforms to DIN 6537L and DIN 6535 standards for consistent dimensional interchangeability

Compatibility

Designed as an OEM-style Series 5511 jobber drill bit for straight-shank tool holders compatible with 0.3937-inch shank diameter collets or drill chucks. Suitable for use in cast iron (ISO material group K) and steel (ISO material group P) workpieces per GUHRING Series 5511 application specifications.

Installation Notes

Installation and tool changes should be performed with the machine in a full stop, locked-out state per applicable OSHA lockout/tagout procedures. Ensure the collet or chuck is clean and free of chips before seating the straight-cylindrical shank. When using the coolant-through feature, verify that the machine spindle and toolholder are rated and configured for through-tool coolant delivery at the required pressure. Handle carbide tooling carefully to avoid edge chipping from contact with hard surfaces during storage and setup.