Guhring 9055250075000 Extra Length Carbide Drill Bit

Product Description

The GUHRING 9055250075000 is a solid carbide extra length drill bit engineered for high-performance drilling in demanding industrial and trade applications. Built to Series 5525 specifications, it features a 7.50 mm (0.2953 inch) diameter, a 140-degree drill point angle, and FIREX coating for extended tool life under high-heat conditions. The web-thinned, tapered web design promotes self-centering and reduces thrust force at entry. Coolant-through capability allows internal coolant delivery directly to the cutting zone, making it well-suited for deep-hole drilling operations where heat and chip evacuation are critical concerns. This bit is intended for installation in CNC machining centers, drill presses, and similar production equipment operated by machinists and tooling professionals.

The 9055250075000 is rated for primary use in cast iron and steel workpiece materials (ISO material codes K and P). Secondary workpiece materials include aluminum, titanium alloy, and other ISO H, M, N, and S code materials. With a flute-to-diameter ratio of 12xD and a maximum drilling depth of 96.75 mm (3.8090 inches), this bit handles deep-hole applications where standard-length drills cannot reach. The straight-cylindrical shank diameter of 0.3150 inches fits standard collet chucks and drill holders used in production and job-shop environments. Compliance with DIN 6537 confirms dimensional and performance standards consistent with precision tooling expectations.

Key Features

• Solid submicron carbide construction for rigidity and wear resistance in ferrous and non-ferrous materials
• FIREX coating reduces friction and heat buildup, extending tool life in high-speed applications
• Coolant-through design delivers cutting fluid directly to the tip for deep-hole chip evacuation
• 140-degree facet point angle with web thinning enables self-centering entry without a pilot hole
• 12xD flute-to-diameter ratio supports drilling depths up to 96.75 mm (3.8090 inches)
• Right-hand cutting, spiral flute, DIN 6537 compliant construction for consistent dimensional accuracy

Compatibility

Designed for use in CNC machining centers, drill presses, and precision drill holders accepting a 0.3150-inch straight-cylindrical shank. Primary workpiece materials are cast iron and steel; secondary materials include aluminum and titanium alloy per ISO material codes H, M, N, and S.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and machine power locked out per applicable shop safety procedures. Verify that the collet chuck or tool holder bore matches the 0.3150-inch shank diameter before securing the bit. Confirm coolant-through passages in the tool holder are clear and properly connected before beginning deep-hole drilling cycles. Dispose of worn carbide tooling in accordance with applicable regulations, including California Proposition 65 guidelines where required.