Precision Twist Drill 6000662 Jobber Drill 3.10mm Cobalt

Product Description

The PRECISION TWIST DRILL 6000662 is a cobalt high-speed steel jobber-length drill bit designed for general-purpose drilling in demanding metal-cutting applications. It measures 3.10 mm (0.122 inch) in diameter with a 135-degree split point geometry and a web-thinned, tapered web configuration that reduces thrust and improves self-centering on entry. The straw oxide/bronze coating provides baseline heat resistance and lubricity. With an overall length of 2-9/16 inches (65.00 mm) and a flute length of 1-27/64 inches (36.00 mm), it fits standard drill chucks and is built to DIN 338 and ANSI specifications. Machinists, maintenance technicians, and fabricators use this bit for production and repair drilling in ferrous and non-ferrous metals.

The 6000662 is suited for drilling steel, cast iron, aluminum, and non-ferrous alloys in both shop and field settings. Its Series 2ACO designation places it in a heavy-duty grade jobber line intended for use where standard HSS bits wear too quickly. The 12xD flute-to-diameter ratio delivers efficient chip evacuation in moderate-depth holes. Compatible workpiece material categories include P (steel), M (stainless), K (cast iron), N (non-ferrous), and S (heat-resistant alloys) per ISO material coding. This bit is used in drill presses, CNC machining centers, and hand drills by machinists and maintenance trades.

Key Features

• Cobalt high-speed steel construction for extended tool life in hard and abrasive metals
• 135-degree split point with web thinning reduces walking and lowers drilling thrust
• Straw oxide/bronze coating adds surface hardness and heat resistance
• Regular spiral, 2-flute design with 12xD flute ratio for efficient chip clearance
• Straight cylindrical shank (3.10 mm / 0.122 inch) fits standard drill chucks without adapters
• Meets DIN 338 and ANSI standards for dimensional consistency and interchangeability

Compatibility

Designed for use in standard drill chucks accepting straight-shank bits at 3.10 mm (0.122 inch) shank diameter. Suitable for use in drill presses, CNC machining centers, and portable hand drills across workpiece material groups P, M, K, N, and S per ISO designation.

Installation Notes

Installation and use of this drill bit is typically performed by machinists, maintenance mechanics, or qualified fabricators. Secure the straight shank firmly in the drill chuck and verify concentricity before drilling. Use appropriate cutting fluid or coolant when drilling steel or stainless to extend tool life and prevent work hardening. Inspect the cutting edges for wear before each use and replace the bit if chipping or dulling is observed.