Precision Twist Drill 5997717 Cobalt Jobber Drill No 22

Product Description

The PRECISION TWIST DRILL 5997717 is a cobalt jobber-length drill bit sized to wire gauge No. 22, with a decimal diameter of 0.1570 inches. It features a 135-degree split-point angle with web thinning for self-centering starts and reduced thrust on entry. The straw oxide finish improves lubricity and surface hardness. At 3.125 inches overall length with a 2-inch flute, this bit is built for general-purpose drilling in steel and other demanding workpiece materials. It is commonly installed and used by machinists, maintenance mechanics, and fabricators working in production or field environments.

This bit is rated for primary workpiece materials classified under material codes P, M, K, N, and S, covering a range of steels, cast irons, non-ferrous metals, and high-temperature alloys. The regular spiral flute design promotes chip evacuation in through-hole and blind-hole applications. It conforms to ANSI and NAS 907 standards and falls within the R10CO-R15CO-R18CO series from Precision Twist Drill, making it appropriate for operations requiring consistent hole quality in metalworking and fabrication settings.

Key Features

• No. 22 wire size, 0.1570-inch decimal diameter for precise hole sizing
• 135-degree point angle with web-thinned tip for self-centering and reduced walking
• Cobalt high-speed steel construction for heat resistance and extended tool life in steel drilling
• Straw oxide finish improves surface hardness and reduces friction at the cutting edge
• Regular spiral, two-flute design promotes chip clearance in both through-hole and blind-hole work
• Straight cylindrical shank compatible with standard drill chucks; no flats
• Meets ANSI and NAS 907 specifications for dimensional consistency

Compatibility

Part of the R10CO-R15CO-R18CO series. Designed for general-purpose drilling in steel and other metallic workpiece materials coded P, M, K, N, and S. Suitable for use with standard three-jaw drill chucks accepting a 0.1570-inch straight shank.

Installation Notes

This drill bit is installed by machinists and maintenance technicians using standard drill presses, lathes, or hand-held power drills. Always secure the workpiece before drilling and confirm the chuck is properly tightened on the straight shank. Power down and de-energize any equipment before changing bits. Coolant-through is not supported on this bit; use external cutting fluid when drilling hardened or heat-sensitive materials to extend tool life.