Precision Twist Drill 5996938 Jobber Drill Bit 3/16 in

Product Description

The PRECISION TWIST DRILL 5996938 is a jobber-length drill bit designed for general-purpose drilling in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. The bit is manufactured from high-speed steel with a bright uncoated finish and features a 135-degree split point that reduces walking and minimizes the need for a center punch on most surfaces. Overall length is 3.5 inches with a parabolic spiral flute and web-thinned tip geometry that promotes efficient chip evacuation during through-hole drilling. This bit is handled daily by machinists, pipefitters, and maintenance technicians across fabrication, plumbing rough-in, and general metalworking applications.

The 5996938 fits standard 3/8-inch and larger keyed or keyless chucks and is suited for bench drill presses, hand drills, and drill drivers used in trade and light industrial settings. The straight cylindrical shank diameter measures 0.1875 inches, matching the 3/16-inch cutting diameter. The QC21P series is rated as a heavy-duty general-purpose bit and conforms to ANSI standards. Typical applications include drilling pilot holes, clearance holes, and through-holes in ferrous and non-ferrous base materials encountered in HVAC, plumbing, and electrical rough-in work.

Key Features

• 3/16 inch (0.1875 inch) cutting diameter with matching straight cylindrical shank
• 135-degree split point reduces bit walking and cutting entry force
• High-speed steel construction rated for steel, stainless steel, cast iron, non-ferrous metals, and titanium
• Parabolic spiral flute with web-thinned, tapered web for improved chip clearance
• 2-flute right-hand cut; maximum drilling depth of 2.3125 inches
• ANSI-compliant QC21P series, heavy-duty grade, no coolant-through requirement

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard chuck accepting a 3/16 inch straight cylindrical shank; suitable for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium workpieces.

Installation Notes

Installation and use should be performed by qualified machinists or trade technicians familiar with rotating cutting tools. Secure the workpiece firmly before drilling and confirm the chuck is fully tightened on the shank before starting the tool. Eye protection and appropriate RPM selection for the workpiece material are required; refer to the drill manufacturer or Machinery Handbook for speed and feed recommendations by material. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.