Precision Twist Drill 5996976 Jobber Drill Bit Hss

Product Description

The PRECISION TWIST DRILL 5996976 is a jobber-length drill bit designed for general-purpose drilling in a wide range of metallic materials. Built from high speed steel with a bright uncoated finish, this bit features a 135-degree split point that reduces walking on entry and lowers thrust requirements compared to a standard 118-degree point. The wire gauge size is 19, corresponding to a decimal diameter of 0.1660 inches. With an overall length of 3.25 inches and a 2-flute parabolic spiral flute geometry, it is suited for production and maintenance drilling in shop or field environments. Licensed HVAC techs, pipefitters, electricians, and general tradespeople keep jobber-length bits like this in regular rotation for hole-making in ferrous and non-ferrous stock.

This bit is appropriate for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium when used at speeds and feeds appropriate to the workpiece material and bit diameter. The straight cylindrical shank fits standard 3-jaw drill chucks on benchtop drill presses, hand drills, and right-angle drill attachments commonly used in mechanical and electrical trade work. The web-thinned, tapered web design improves chip evacuation and reduces heat buildup during through-hole drilling. Maximum drilling depth is 2.125 inches, consistent with the flute length.

Key Features

• Wire size 19 diameter: 0.1660 inches, suitable for a broad range of tapping and clearance hole applications
• 135-degree split point reduces drill walking and lowers feed force on entry
• High speed steel construction handles steel, stainless steel, cast iron, non-ferrous metals, and superalloys
• Web-thinned tapered web improves chip flow and reduces heat in the cut zone
• Straight cylindrical shank fits standard 3-jaw drill chucks without adapters
• Bright uncoated finish allows easy visual inspection of cutting edge condition
• Meets ANSI standards; Series QC21P heavy-duty grade for consistent dimensional accuracy

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard 3-jaw drill chuck that accepts a 0.1660-inch straight cylindrical shank, including benchtop drill presses, portable hand drills, and right-angle drill drivers used across mechanical, electrical, and plumbing trades.

Installation Notes

Secure the shank fully in the drill chuck and verify concentricity before beginning a cut. Match spindle speed to the workpiece material and bit diameter per standard machining reference tables — harder materials require lower RPM. Apply cutting fluid when drilling stainless steel, superalloys, or titanium to extend tool life and control heat. Inspect the cutting edges before each use; a worn or chipped point should be resharpened or replaced before drilling to avoid oversize holes or shank breakage.