Precision Twist Drill 5999674 Cobalt Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5999674 is a cobalt high-speed steel jobber-length drill bit designed for drilling operations in steel and other demanding workpiece materials. It measures 1.75 mm in diameter with an overall length of 1.8125 inches and a flute length of 0.8594 inches. The 135-degree split point reduces walking on entry and lowers the thrust needed to start a hole. A straw oxide finish provides light lubricity and surface protection. This bit is suited for general-purpose drilling where a heavy-duty grade tool is required, and it is installed and used by machinists, maintenance technicians, and trade professionals working with ferrous and non-ferrous metals.

This jobber drill bit is appropriate for drilling into steel, cast iron, aluminum, non-ferrous alloys, and high-temp alloys, as reflected by its primary workpiece material codes P, M, K, N, and S. The straight cylindrical shank accepts standard drill chucks on benchtop drill presses, hand drills, and CNC machining centers. Its 13xD flute-to-diameter ratio provides adequate chip evacuation for shallow to moderate-depth holes in production and maintenance settings.

Key Features

• 1.75 mm diameter cobalt construction for heat resistance in demanding materials
• 135-degree web-thinned split point for self-centering entry and reduced thrust
• Straw oxide finish for light lubricity and corrosion resistance
• Regular spiral flute design promotes consistent chip removal
• Straight cylindrical shank fits standard drill chucks without adapters
• Conforms to DIN 338 and ANSI standards for dimensional accuracy

Compatibility

Designed as a general-purpose jobber drill compatible with any standard drill chuck accepting a 0.0689-inch straight shank, including benchtop drill presses, hand drills, and CNC machining centers used in metalworking and maintenance applications.

Installation Notes

Secure the shank fully in the drill chuck and verify concentricity before operation. Use appropriate cutting fluid or coolant when drilling steel to extend tool life and manage heat. Wear appropriate eye protection and secure the workpiece firmly before drilling. Inspect the cutting edges for wear or chipping before each use and replace the bit if damage is observed.