Guhring 9002350120000 Extra Length Hss Drill Bit 0.4724in

Product Description

The GUHRING 9002350120000 is an extra length high speed steel drill bit designed for deep hole drilling applications in metalworking and machining operations. Built to DIN 1869 standards, this Series 235 bit measures 0.4724 inches (12.00 mm) in diameter with an overall length of 11.614 inches (295.00 mm), giving it a flute-by-diameter ratio of 10xD that reaches depths conventional jobber-length bits cannot access. The 118-degree point angle and web-thinned tip reduce entry force and improve centering on steel and cast iron surfaces. Two right-hand spiral flutes evacuate chips efficiently throughout the cut. The oxide finish provides surface hardness and basic corrosion resistance suitable for production environments.

This drill bit is suited for deep-hole drilling in cast iron, steel, and aluminum workpieces in both production shop and maintenance machining contexts. The straight-cylindrical shank with an h8 diameter tolerance seats securely in standard drill chucks and collet holders without slipping under load. Typical applications include through-hole and blind-hole drilling where standard-length bits lack the reach. It is commonly used by machinists, tool-and-die professionals, and maintenance technicians working on structural components, fixtures, and fabricated assemblies.

Key Features

• Extra length design with 10xD flute-to-diameter ratio supports deep hole drilling up to 7.362 inches (187.00 mm) maximum depth
• DIN 1869 standard construction ensures dimensional consistency and interchangeability
• Web-thinned point reduces thrust force and improves self-centering on entry
• 118-degree drill point angle suited for general-purpose work in steel and cast iron
• Oxide finish adds surface hardness and basic lubricity for dry or mist-cooled cutting
• Right-hand cut, two-flute spiral geometry promotes efficient chip evacuation in deep holes

Compatibility

Designed as a general-purpose extra length drill bit for use in cast iron, steel, and aluminum workpieces. The straight-cylindrical shank with h8 tolerance is compatible with standard drill chucks and collet systems accepting 12.00 mm shank diameters.

Installation Notes

This bit should be installed and used by qualified machinists or tooling technicians familiar with deep-hole drilling procedures. Secure the shank fully in the chuck or collet before beginning a cut, and verify runout before committing to depth. Coolant-through capability is not supported on this bit, so adequate external lubrication or mist cooling should be applied during deep-hole operations to prevent heat buildup. Follow applicable shop safety standards and machine guarding requirements during setup and use.