Precision Twist Drill 5996980 No. 20 Hss Jobber Drill

Product Description

The PRECISION TWIST DRILL 5996980 is a high speed steel jobber-length drill bit sized to No. 20 wire gauge, equivalent to 0.1610 inches in diameter. Ground with a 135-degree split-point angle and a web-thinned tip, it starts on contact without a center punch and cuts through material with less thrust than a conventional 118-degree point. The regular spiral flute measures 2.125 inches in length, and the overall length is 3.25 inches. The bright, uncoated finish suits general-purpose drilling across a broad range of materials. This bit belongs to Precision Twist Drill Series QC21P and meets ANSI standards.

This drill bit is suited for production and maintenance drilling in steel, aluminum, and other non-ferrous metals. The straight cylindrical shank accepts standard drill chucks on portable drills, drill presses, and CNC machining centers. With a flute-to-diameter ratio of 13xD and a maximum drilling depth of 2.125 inches, it performs reliably in through-hole and blind-hole operations encountered in fabrication, mechanical maintenance, and light manufacturing environments. Machinists, millwrights, and maintenance technicians are the typical users.

Key Features

• No. 20 wire size, 0.1610-inch diameter — straight cylindrical shank for universal chuck compatibility
• 135-degree split point with web thinning for self-centering starts and reduced thrust
• High speed steel construction provides toughness and heat resistance for general-purpose metalworking
• Bright/uncoated finish — compatible with most cutting fluids and oils
• Regular spiral flute geometry promotes chip evacuation during through-hole drilling
• Conforms to ANSI standards; Series QC21P general-purpose grade

Compatibility

Designed as a general-purpose jobber drill bit for use in steel, aluminum, and non-ferrous workpiece materials; fits any standard drill chuck accepting a 0.1610-inch straight shank.

Installation Notes

Installation of this bit is performed by machinists, millwrights, or maintenance technicians using a standard keyed or keyless drill chuck. Secure the shank fully in the chuck and verify runout before beginning a cut. Use an appropriate cutting fluid or oil when drilling steel to extend bit life and improve hole quality. Replace the bit if the cutting edges show visible wear or chipping to avoid oversize holes or workpiece damage.