Guhring 9055120074000 Taper Length Drill Bit 7.4 Mm

Product Description

The GUHRING 9055120074000 is a solid carbide taper length drill bit designed for demanding metal-cutting applications in production and maintenance environments. Built to DIN 6537 standards, it features a 140-degree split point (SU point type) with web thinning for self-centering entry and reduced thrust. The bit carries a FIREX coating for extended tool life in abrasive and hard materials. The flute length runs 76 mm with an overall length of 116 mm and a straight cylindrical shank diameter of 8 mm. Coolant-through capability supports high-speed drilling in deep-hole applications. Licensed machinists and tool-and-die professionals are the primary installers.

This drill bit is suited for drilling alloy steel, cast iron, and stainless steel in both job-shop and production floor settings. The 7xD flute-to-diameter ratio and a maximum drilling depth of 64.90 mm make it appropriate for through-hole and blind-hole work where a standard-length bit lacks reach. The right-hand spiral flute with regular helix handles chip evacuation efficiently in ferrous materials. The 8 mm straight shank fits standard ER collet chucks and precision drill chucks commonly found on CNC machining centers, drill presses, and milling machines.

Key Features

• Solid carbide construction, material grade K40, for rigidity and wear resistance in hard ferrous materials
• FIREX coating extends tool life when drilling alloy steel, cast iron, and stainless steel
• 140-degree SU split point with web thinning for self-centering and reduced entry thrust
• Coolant-through design supports chip flushing and heat management in deep holes
• 7xD flute-to-diameter ratio with a maximum drilling depth of 64.90 mm
• DIN 6537 standard, right-hand cut, regular spiral flute

Compatibility

Designed for use in alloy steel, cast iron, and stainless steel applications. The 8 mm straight cylindrical shank fits standard ER collet chucks and precision drill chucks on CNC machining centers, drill presses, and milling machines that accept 8 mm shank tooling.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the machine powered down and locked out per OSHA lockout/tagout procedures. Verify collet chuck or drill chuck runout before seating the shank to avoid premature edge wear. Coolant-through setups require confirmed coolant supply pressure and clean lines before starting a cut. Do not exceed the rated maximum drilling depth of 64.90 mm in a single pass without appropriate pecking cycles.