Precision Twist Drill 6000586 Cobalt Jobber Drill 9.40mm

Product Description

The PRECISION TWIST DRILL 6000586 is a cobalt jobber-length drill bit designed for heavy-duty drilling in steel and other demanding workpiece materials. It features a 135-degree split point with web thinning for fast engagement and reduced walking on entry, eliminating the need for a center punch in most applications. The straw oxide finish provides mild lubricity and heat resistance during cutting. With a straight cylindrical shank and regular spiral flute geometry, this bit installs in standard drill chucks and is compatible with most handheld and machine drilling setups. Licensed machinists, maintenance mechanics, and metalworking trades reach for cobalt-grade jobber bits when high-speed steel alone is not sufficient.

This drill bit is built for drilling steel, stainless, cast iron, non-ferrous alloys, and similar materials classified under DIN 338 and ANSI standards. It suits general-purpose production drilling in machine shops, fabrication environments, and maintenance repair operations. The 9xD flute-to-diameter ratio allows for adequate chip evacuation in through-hole and moderate-depth drilling applications. Coolant-through capability is not supported, so external coolant or cutting oil application is recommended when drilling harder alloys or at higher feed rates.

Key Features

• Cobalt construction for elevated heat and wear resistance in ferrous and hard materials
• 135-degree split point with web thinning reduces thrust and self-centers on entry
• Straw oxide finish provides mild lubricity and corrosion resistance
• Regular spiral flute with tapered web configuration promotes reliable chip evacuation
• Straight cylindrical shank fits standard drill chucks without adapters
• Meets DIN 338 and ANSI standards for jobber-length drill geometry

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with standard three-jaw drill chucks and machining centers accepting straight-shank tooling in the 9.40 mm diameter range.

Installation Notes

Installation and use should be performed by qualified machinists or tradespeople familiar with metalworking drill press or CNC setup procedures. Secure the shank fully in the chuck and verify runout before drilling. Apply cutting oil or external coolant when working harder ferrous alloys to extend tool life and control heat buildup. Do not exceed the rated maximum drilling depth of approximately 3.189 inches without retracting to clear chips.