Precision Twist Drill 6000643 Cobalt Jobber Drill 6.70mm

Product Description

The PRECISION TWIST DRILL 6000643 is a cobalt jobber-length drill bit designed for general-purpose drilling in steel and other demanding workpiece materials. Built to DIN 338 and ANSI standards, this heavy-duty bit features a 135-degree split point for reduced walking and faster penetration on hard stock. The 6.70 mm (0.2638 inch) diameter, right-hand spiral flute geometry and straw oxide finish help extend tool life during repetitive drilling operations. Licensed trades and machining professionals reach for this bit when productivity and hole quality matter on ferrous and mixed-material work.

This bit is suited for production drilling, maintenance, and fabrication environments where steel, cast iron, non-ferrous metals, and composite materials are encountered. The straight cylindrical shank fits standard three-jaw drill chucks on floor-standing drill presses, magnetic base drills, and hand-held power drills. The 9xD flute-to-diameter ratio and web-thinned, tapered web configuration support chip evacuation in deeper holes without regrinding.

Key Features

• Cobalt high-speed steel construction for heat and wear resistance in hard metal drilling
• 135-degree web-thinned point reduces thrust force and minimizes bit walking on entry
• Straw oxide finish provides lubricity and basic corrosion protection
• Regular right-hand spiral flute promotes efficient chip evacuation
• Straight cylindrical shank fits standard drill chucks without adapters
• Meets DIN 338 and ANSI dimensional standards for interchangeability

Compatibility

Designed for use with standard three-jaw drill chucks accepting straight-shank bits with a 6.70 mm (0.2638 inch) shank diameter. Primary workpiece material classifications P, M, K, N, and S are supported per the supplier specification, covering steel, stainless, cast iron, non-ferrous, and high-temp alloys.

Installation Notes

This bit is installed and serviced by machinists, maintenance mechanics, pipefitters, and other trades using drilling equipment. Always power down and lock out the drilling machine before changing bits. Seat the straight shank fully into the chuck and tighten securely to prevent slippage under load. Do not exceed the rated drilling depth of 2.48 inches without retracting to clear chips, and use appropriate cutting fluid for ferrous workpieces to maximize tool life.