Precision Twist Drill 5996782 Jobber Drill Bit 41/64 in

Product Description

The PRECISION TWIST DRILL 5996782 is a jobber-length drill bit designed for general-purpose drilling in metal and hard materials. Built from high speed steel with a bright uncoated finish, it features a 135-degree split point and a parabolic spiral flute for efficient chip evacuation and reduced thrust on entry. The straight cylindrical shank measures 41/64 inches in diameter, matching the cutting diameter at 0.6406 inches decimal. The overall length is 7.125 inches with a flute length of 5.1875 inches and a maximum drilling depth of 5.1875 inches. This bit belongs to the QC21P series and is rated heavy duty. It is installed by machinists, maintenance mechanics, and trade professionals working in metal fabrication and industrial maintenance applications.

This drill bit is suited for use in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. The web-thinned, tapered web configuration reduces cutting resistance in harder workpiece materials. With a right-hand cut and a two-flute parabolic design, it performs well in drill presses, lathes, and hand-held power drills when adequate feed and speed are maintained. The 8xD flute-to-diameter ratio makes it appropriate for moderate-depth holes typical of jobber-length applications in production and maintenance environments.

Key Features

• 135-degree split point reduces walking and lowers entry thrust on hard materials
• Parabolic spiral flute promotes efficient chip removal and reduced heat buildup
• Web-thinned tapered web lowers cutting resistance in steel and stainless steel
• High speed steel construction rated for heavy-duty drilling across ferrous and non-ferrous metals
• Straight cylindrical shank for broad compatibility with standard drill chucks
• ANSI standard compliant, QC21P series

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with standard three-jaw drill chucks accepting a 41/64-inch straight cylindrical shank. Suitable for use in drill presses, CNC machines, lathes, and hand-held power drills. Primary workpiece material codes P, M, K, N, and S indicate suitability for steel, stainless steel, cast iron, non-ferrous metals, and superalloys including titanium.

Installation Notes

Secure the shank fully in the drill chuck and verify concentricity before starting the cut. Power down and de-energize the machine before changing bits. Apply appropriate cutting fluid when drilling stainless steel, superalloys, or titanium to extend tool life and manage heat. Follow machine manufacturer feed and speed recommendations for the workpiece material; improper feed rate is the leading cause of premature HSS bit failure.