Guhring 9055110072000 Carbide Jobber Drill Bit 0.2835 in

Product Description

The GUHRING 9055110072000 is a solid carbide jobber-length drill bit designed for high-performance drilling in demanding production environments. Built to DIN 6537L standards, it features a 140-degree split point (SU type) with web thinning for self-centering entry without a pilot hole. The FIREX coating improves heat and wear resistance, extending tool life in abrasive and hard materials. With a 0.2835-inch cutting diameter and a straight-cylindrical shank measuring 0.3150 inches in diameter, this bit suits precision work in machine shop, fabrication, and toolroom applications. It is typically installed in CNC machining centers, drill presses, and production drilling fixtures by machinists and tooling professionals.

This drill bit is suited for drilling cast iron and steel workpieces, corresponding to material codes K and P. The 5xD flute-to-diameter ratio and 2-flute spiral configuration support efficient chip evacuation in deeper holes. The coolant-through design allows internal coolant delivery directly to the cutting edge, making it a practical choice for high-cycle production runs where heat management is critical. The maximum drilling depth is 1.661 inches (42.20 mm), keeping performance within the designed flute capacity.

Key Features

• Solid carbide submicron-grade construction for rigidity and wear resistance in ferrous materials
• FIREX coating for elevated heat resistance and extended tool life
• 140-degree SU split point with web thinning for self-centering, no pilot hole required
• Coolant-through design delivers cutting fluid directly to the drill tip
• DIN 6535 and DIN 6537L compliant for dimensional and geometric conformance
• Straight-cylindrical shank for secure, concentric clamping in standard collets and chucks

Compatibility

Designed as an OEM-style replacement or direct tooling solution for applications requiring a 0.2835-inch diameter jobber drill conforming to DIN 6537L, Series 5511, for use in cast iron and steel.

Installation Notes

Installation and use of carbide drill bits should be performed by qualified machinists familiar with speeds, feeds, and clamping requirements for solid carbide tooling. Ensure the spindle and chuck are clean and concentric before seating the straight-cylindrical shank to prevent runout. If coolant-through capability is used, verify that the machine tool spindle supports internal coolant delivery at the required pressure. Avoid impact or side-loading forces that can chip carbide cutting edges.