Precision Twist Drill 5996929 Jobber Drill Bit 8mm Hss

Product Description

The PRECISION TWIST DRILL 5996929 is an 8 mm (0.3150 inch) jobber-length drill bit designed for general-purpose drilling in a wide range of materials. Built from high-speed steel with a bright uncoated finish, it features a 135-degree split point and a web-thinned, tapered web construction that reduces walking on entry and lowers thrust requirements. The parabolic spiral flute promotes efficient chip evacuation, making it well suited for deeper holes. Overall length is 4.6063 inches (117 mm) with a flute length of 2.9528 inches (75 mm). The straight-cylindrical shank accepts standard drill chucks without adapters. This bit weighs approximately 0.083 pounds.

This jobber-length bit is a general-purpose drilling tool rated for use in steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. It is a fit for machinists, maintenance technicians, pipefitters, plumbers, electricians, and HVAC professionals who need a reliable metric drill bit for production or field drilling. The QC21PM series is built to DIN 338 standards, making it a recognized specification in both shop and field environments.

Key Features

• 8 mm (0.3150 inch) diameter, jobber length per DIN 338 specification
• 135-degree split point with web thinning reduces thrust and minimizes bit walking
• Parabolic spiral flute for efficient chip evacuation in deep drilling applications
• High-speed steel construction rated for steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium
• Straight-cylindrical shank fits standard keyed and keyless drill chucks
• Bright uncoated finish — no coating to delaminate; suitable for use with cutting fluids

Compatibility

Designed as a general-purpose replacement or stock bit compatible with any drill press, hand drill, or milling machine equipped with a standard chuck capable of accepting an 8 mm straight-cylindrical shank. Rated for workpiece material codes P, M, K, N, and S per ISO classification.

Installation Notes

Secure the shank fully in the chuck jaws before drilling and verify chuck key is removed before powering the tool. When drilling stainless steel, superalloys, or titanium, use an appropriate cutting fluid and reduce spindle speed to extend bit life. For production drilling or deep-hole work, clear chips frequently to prevent flute packing and overheating. Follow applicable shop safety standards and wear appropriate eye protection.