Precision Twist Drill 6000712 Jobber Drill 4.30mm Cobalt

Product Description

The PRECISION TWIST DRILL 6000712 is a cobalt high-speed steel jobber-length drill bit designed for general-purpose drilling in steel and other demanding workpiece materials. It features a 135-degree split-point geometry with web thinning, which reduces walking on entry and lowers thrust force compared to a standard 118-degree point. The straw oxide finish provides moderate lubricity and heat resistance during cutting. At 3-5/32 inches overall length with a 1-27/32-inch flute, it fits standard drill chucks and drill press spindles used daily by machinists, maintenance techs, and metalworking tradespeople.

This bit is suited for production and maintenance drilling in steel, cast iron, non-ferrous metals, and similar materials covered by workpiece material codes P, M, K, N, and S per DIN classification. The straight cylindrical shank seats directly in keyless or keyed chucks without an adapter. Typical applications include through-hole and blind-hole drilling in structural steel, plate, tubing, and fabricated assemblies where a general-purpose cobalt bit is specified. It conforms to DIN 338 and ANSI standards, making it a drop-in match for jobber-length drill sets built to those specifications.

Key Features

• Cobalt high-speed steel construction for elevated heat resistance in steel drilling
• 135-degree split point with web thinning reduces thrust and self-centers on entry
• Straw oxide finish improves lubricity and extends tool life in ferrous materials
• Regular spiral flute geometry promotes chip evacuation in through-hole applications
• Straight cylindrical shank fits standard 3-jaw drill chucks without adapters
• Conforms to DIN 338 and ANSI jobber-length standards for consistent fitment

Compatibility

Designed as a DIN 338 and ANSI-compliant jobber-length drill bit compatible with any standard drill chuck or drill press spindle accepting a 4.3 mm straight shank. Workpiece material classification P, M, K, N, and S indicates suitability for steel, stainless, cast iron, non-ferrous, and heat-resistant alloys.

Installation Notes

Installation and use should be performed by a qualified machinist or maintenance technician familiar with drill press, hand drill, or CNC drilling operations. Secure the shank fully in the chuck and verify runout before drilling. Always power down and lock out the machine spindle before changing bits. Do not exceed the recommended maximum drilling depth of approximately 1.85 inches without retracting to clear chips.