Guhring 9006660012000 Extra Length Drill Bit Hss Tin

Product Description

The GUHRING 9006660012000 is a high speed steel (HSS) extra length drill bit with a titanium nitride (TiN) coating, designed for precision drilling in demanding trade and industrial applications. At 1.20 mm (0.0472 inches) in diameter with a 52 mm (2.047 inches) overall length and a 30 mm (1.181 inches) flute length, this bit delivers extended reach in small-diameter work. The 118-degree drill point angle and web-thinned, tapered web configuration reduce entry force and improve centering accuracy. It carries a right-hand cutting direction, a two-flute spiral design, and meets DIN 339 standards. Machinists, tool and die technicians, and precision fabricators are the primary users.

This drill bit is rated for use in aluminum and similar non-ferrous and general-purpose materials, consistent with its K, N, and P workpiece material codes. The straight-cylindrical shank with an h8 diameter tolerance seats cleanly in standard drill chucks and bushing tooling. The Series 666 designation places it in a recognized family of extra-length small-diameter bits suited for through-hole work in fixtures, jigs, and tooling plates where standard-length bits cannot reach. The 10xD flute-to-diameter ratio supports chip evacuation in deeper holes, with a maximum drilling depth of 28.20 mm (1.110 inches).

Key Features

• TiN coating extends cutting life and reduces friction compared to uncoated HSS
• 118-degree drill point angle suits general-purpose and non-ferrous material entry
• Web-thinned tapered web reduces thrust force and improves hole start accuracy
• Straight-cylindrical shank with h8 tolerance fits standard chucks and bushing holders
• DIN 339 standard compliance ensures dimensional consistency for precision tooling setups
• Two-flute spiral design with 10xD ratio supports chip clearance in extended-reach holes

Compatibility

Designed for use in bushing-guided tooling applications and compatible with standard straight-shank drill chucks accepting a 1.20 mm shank diameter. Intended for aluminum and general-purpose workpiece materials per material codes K, N, and P.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with small-diameter drill bit handling. Secure the shank fully in the chuck before operation and verify runout is within acceptable tolerance for precision work. Power down the machine and lock out energy sources before changing bits. Avoid side-loading this diameter, as small HSS bits are brittle under lateral force.