Precision Twist Drill 6000577 Cobalt Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 6000577 is a cobalt jobber-length drill bit designed for heavy-duty drilling in steel and other demanding workpiece materials. It measures 9.10 mm (0.3583 inches) in diameter with an overall length of 4-59/64 inches (125 mm) and a flute length of 3-3/16 inches (81 mm). The 135-degree split point reduces walking on entry and decreases the thrust force needed to start a hole. A straw oxide finish provides mild lubricity and heat resistance. This bit is suited for professional machinists, tool-and-die workers, maintenance technicians, and fabricators who drill steel and similar metals in production or job-shop environments.

This jobber drill is built for drilling into steel, cast iron, non-ferrous metals, and high-temperature alloys, covering Primary Workpiece Material Codes P, M, K, N, and S under the DIN 338 and ANSI standards. The 9xD flute-to-diameter ratio provides adequate chip clearance for moderate-depth holes. The straight cylindrical shank with zero flats is compatible with standard three-jaw drill chucks on drill presses, CNC machining centers, and handheld power drills. The web-thinned, tapered web construction reduces cutting resistance and extends tool life in repetitive drilling operations.

Key Features

• Cobalt high-speed steel construction rated for heavy-duty service in steel and hard alloys
• 135-degree standard split point reduces drill walk and lowers required feed pressure
• Straw oxide finish adds surface hardness and mild lubricity without coolant-through requirement
• Web-thinned, tapered web reduces cutting torque and improves chip evacuation
• Regular right-hand spiral flute with 9xD ratio for effective chip clearance at jobber depth
• Straight cylindrical shank (9.1 mm) fits standard drill chucks without adapters
• Conforms to DIN 338 and ANSI standards for consistent dimensional tolerances

Compatibility

Designed as a general-purpose jobber drill for use in any standard drill chuck accepting a straight cylindrical shank. Rated for drilling steel, cast iron, non-ferrous metals, and high-temperature alloys per DIN 338 Series 2ACO specifications.

Installation Notes

This drill bit is installed and operated by machinists, maintenance technicians, and fabricators using drill presses, CNC equipment, or handheld power tools. Secure the straight shank firmly in a properly sized three-jaw chuck before operation and verify chuck runout is within acceptable limits to prevent premature edge wear. Disengage and lock out all power sources before changing tooling. Do not exceed the rated maximum drilling depth of 3.189 inches to avoid chip packing and bit breakage.