Guhring 9055110099200 Carbide Jobber Drill 25/64 in Firex

Product Description

The GUHRING 9055110099200 is a solid carbide jobber-length drill bit designed for high-performance drilling in steel and cast iron. Built to DIN 6537L standards, it features a 140-degree split-point (SU) tip geometry and a FIREX coating that extends tool life in demanding production environments. The straight-cylindrical shank measures 0.3937 inches in diameter, and the overall length is 4.0551 inches (103 mm). Two spiral flutes in a regular helix provide efficient chip evacuation. Coolant-through capability supports high-speed drilling cycles where external coolant alone is insufficient. This bit is intended for use by machinists, tool and die professionals, and industrial maintenance technicians.

The 9055110099200 belongs to Guhring Series 5511 and is engineered for self-centering applications in ferrous materials including steel (material code P) and cast iron (material code K). The 5xD flute-to-diameter ratio and web-thinned, tapered web configuration make it well suited for medium-depth production drilling on CNC machining centers, drill presses, and automated lines where consistent entry geometry and chip control are critical. The 25/64-inch (0.3906 inches decimal) diameter falls within the 0.3500 to 0.4000 inch size range of this series.

Key Features

• Solid carbide submicron-grade construction for rigidity and wear resistance in ferrous materials
• FIREX coating provides elevated heat resistance and extended tool life
• 140-degree SU split-point tip is self-centering and reduces thrust load at entry
• Coolant-through design supports internal coolant delivery for deep-hole and high-speed cycles
• Web-thinned, tapered web reduces cutting resistance and improves chip flow
• Conforms to DIN 6535 and DIN 6537 L standards for consistent interchangeability

Compatibility

Designed for drilling steel (DIN material code P) and cast iron (DIN material code K) in CNC and manual drilling applications. Compatible with straight-shank toolholders and drill chucks accepting a 0.3937-inch shank diameter. Fits Series 5511 Guhring tooling setups conforming to DIN 6535 shank standards.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the machine powered down and locked out per applicable OSHA lockout/tagout procedures. Ensure the toolholder or chuck is clean and free of debris before seating the straight shank to the full shank engagement depth. Do not exceed the maximum drilling depth of 1.8160 inches (46.12 mm) per the flute-length limitation. When using coolant-through capability, verify that the machine spindle coolant circuit is rated for the required pressure before operating.