Guhring 9006660011000 Extra Length Drill Bit 1.1 Mm Hss

Product Description

The GUHRING 9006660011000 is an extra length high-speed steel drill bit with a titanium nitride (TiN) coating, designed for precise small-diameter drilling in production and maintenance environments. At 1.1 mm in diameter and 50 mm overall length, this bit delivers extended reach compared to standard jobber-length drills. The 118-degree point angle and web-thinned tip reduce entry force and improve chip evacuation. Right-hand spiral flutes with a regular helix move chips efficiently out of the bore. The h8 diameter tolerance ensures consistent, repeatable hole sizing for close-tolerance work. GUHRING Series 666 drills are a common choice for machinists, toolroom technicians, and precision assembly operations.

This drill bit is suited for drilling aluminum and other non-ferrous materials, as well as general-purpose ferrous applications. The extra length design accommodates bushing applications where standard-length drills cannot reach. With a straight-cylindrical shank, it seats directly in standard drill chucks, collet holders, and drill press spindles without adapters. The 10xD flute-to-diameter ratio provides the extended flute length needed for deeper holes relative to the bit diameter.

Key Features

• 1.1 mm diameter with h8 tolerance for close-tolerance hole sizing
• TiN coating extends tool life and reduces friction in aluminum and steel
• 118-degree point angle with web thinning for reduced thrust and clean entry
• 50 mm overall length with 28 mm flute length for extended reach applications
• Right-hand spiral flutes with regular helix for efficient chip removal
• Straight-cylindrical shank fits standard chucks and collet systems without adapters

Compatibility

Designed for use in bushing applications per the Series 666 specification and conforms to DIN 339 standards. Compatible with standard straight-shank drill chucks, ER collet systems, and drill press spindles accepting 1.1 mm shank diameter tooling. Primary workpiece materials include aluminum, non-ferrous metals, and general-purpose steels.

Installation Notes

This bit is installed by toolroom machinists and precision assembly technicians. Secure the straight-cylindrical shank firmly in a drill chuck or collet holder before operation, ensuring the shank is fully seated and the holder is properly torqued. For best results at this diameter, use a drill press or CNC machining center with controlled feed rates to prevent bit breakage. Always wear appropriate eye protection and follow shop safety procedures when operating drilling equipment.