Precision Twist Drill 5996949 4.00 Mm Hss Jobber Drill

Product Description

The PRECISION TWIST DRILL 5996949 is a 4.00 mm diameter jobber-length drill bit designed for general-purpose drilling in metal fabrication, maintenance, and light manufacturing environments. Built from high speed steel (HSS) with a bright uncoated finish, it features a 135-degree split point that reduces walking and requires less thrust at entry. The web-thinned, tapered web construction improves chip evacuation and reduces heat buildup during drilling. At 2.9531 inches overall length with a 1.6875-inch flute length, it fits standard drill chucks and magnetic drill press setups used by machinists, pipefitters, and electricians alike.

This bit is suited for drilling steel, aluminum, and non-ferrous metals in residential and commercial trade applications. Typical uses include conduit and panel knockout work, structural steel fabrication, HVAC sheet metal, and plumbing rough-in where precise, clean-entry holes are required in ferrous and non-ferrous materials. The straight cylindrical shank accepts standard 3-jaw chucks on bench drills, hand drills, and drill presses. It conforms to DIN 338 standards, making it a direct fit in metric tooling setups common in commercial construction and industrial maintenance.

Key Features

• 4.00 mm (0.1575 inch) diameter with straight cylindrical shank for universal chuck compatibility
• 135-degree standard point angle with web thinning for reduced entry force and less bit walking
• High speed steel construction rated for steel, aluminum, and non-ferrous workpiece materials
• Bright uncoated finish suitable for general-purpose drilling without specialized coatings
• Regular spiral flute with 11xD flute-to-diameter ratio for efficient chip removal
• Conforms to DIN 338 specification for consistent dimensional accuracy

Compatibility

Designed for general-purpose drilling in steel, aluminum, and non-ferrous metals per workpiece material codes P, M, K, N, and S. Fits any standard drill chuck accepting a 4.00 mm straight shank. Part of the PRECISION TWIST DRILL QC21PM series.

Installation Notes

Install and remove drill bits only with the drill unpowered and the chuck fully released. Secure the workpiece before drilling to prevent rotation or slipping. Use appropriate cutting fluid or lubricant when drilling ferrous metals to extend bit life and maintain hole quality. Inspect the point and flutes for wear or chipping before each use; a damaged bit should be replaced or resharpened before continuing work.