Precision Twist Drill 6000556 Cobalt Jobber Drill 8mm

Product Description

The PRECISION TWIST DRILL 6000556 is a cobalt jobber-length drill bit designed for general-purpose drilling in metal and other demanding workpiece materials. Built to DIN 338 and ANSI standards, this bit features a 135-degree split point with web thinning that reduces walking on entry and lowers thrust requirements at the spindle. The straw oxide finish provides light surface protection and helps with chip identification during cutting. At 4.6094 inches overall length with a 2.9531-inch flute, it fits standard jobber drill applications on drill presses, lathes, and hand-held power tools used in metalworking and fabrication trades.

This bit is suited for drilling steel, cast iron, aluminum, non-ferrous metals, and high-temperature alloys, consistent with its P, M, K, N, and S workpiece material classifications. The straight cylindrical shank fits standard three-jaw chucks without adapters. Its 9xD flute-to-diameter ratio and regular spiral flute geometry make it a reliable choice for production and maintenance drilling in shop and field settings where a heavy-duty cobalt bit is required.

Key Features

• Cobalt construction for increased heat resistance and durability in hard metal drilling
• 135-degree split point with web thinning reduces walking and lowers required feed force
• Straw oxide finish for light surface protection and chip color reference
• Regular spiral flute geometry promotes efficient chip evacuation in through-hole drilling
• Straight cylindrical shank fits standard three-jaw drill chucks without modification
• Meets DIN 338 and ANSI standards for consistent dimensional and performance tolerances

Compatibility

Designed as a general-purpose jobber drill for use in drill presses, milling machines, lathes, and hand-held power tools equipped with a standard three-jaw chuck sized for an 8.00 mm or 0.3150-inch straight shank.

Installation Notes

Installation and use should be performed by machinists, tool-and-die technicians, or qualified metalworking tradespeople familiar with proper speeds and feeds for cobalt tooling. Secure the straight shank fully in the chuck and verify runout before engaging the workpiece. Wear appropriate eye protection and ensure the workpiece is firmly fixtured before drilling. Do not exceed the drill's rated flute depth of 2.9531 inches when boring through material in a single pass without retracting to clear chips.