Guhring 9006180039700 Extra Length Cobalt Drill Bit

Product Description

The GUHRING 9006180039700 is a Series 618 extra length cobalt drill bit designed for deep hole drilling in demanding production environments. Measuring 0.1562 inches in diameter with a 6.89-inch overall length and a 4.724-inch flute length, this bit delivers reach that standard-length drills cannot match. The parabolic flute geometry promotes efficient chip evacuation in deep-hole applications, while the web-thinned, tapered web reduces thrust at entry and improves penetration. Built from uncoated cobalt steel, this drill bit suits machinists and tool room technicians working on precision assemblies where hole depth-to-diameter ratio is critical.

This drill bit is rated for a maximum drilling depth of 4.49 inches (114.05 mm), reflecting a 15xD flute-by-diameter ratio consistent with DIN 1869 extra length specifications. It is suited for production and job shop use on aluminum, titanium alloys, and steel. The straight-cylindrical shank accepts standard drill chucks without adapters. Right-hand cutting direction is standard. Typical applications include deep-feature drilling in aerospace components, structural assemblies, and precision machined parts where shorter drills cannot achieve required depth in a single pass.

Key Features

• Cobalt construction provides elevated heat and wear resistance compared to standard high-speed steel
• Parabolic flute profile supports fast chip evacuation and reduced chip packing in deep holes
• Web-thinned, tapered web lowers entry thrust and improves drill stability at depth
• 15xD flute-to-diameter ratio enables deep-hole drilling in a single setup
• DIN 1869 specification ensures dimensional consistency and interchangeability
• Straight-cylindrical shank with 5/32-inch diameter fits standard drill chucks

Compatibility

Designed as a DIN 1869 Series 618 extra length drill for use on aluminum, titanium alloys, and steel workpieces. Compatible with any standard drill chuck or collet accepting a 5/32-inch straight-cylindrical shank.

Installation Notes

Installation and use of this drill bit should be performed by machinists or tool room technicians familiar with drilling feeds, speeds, and fixturing for cobalt tooling. Secure the workpiece rigidly before drilling to prevent deflection at depth. Verify chuck runout is within acceptable limits before beginning a deep-hole operation, as excess runout accelerates drill wear and affects hole straightness. Follow applicable shop safety procedures and machine guarding requirements when operating drilling equipment.