Precision Twist Drill 5997604 1/2 in Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5997604 is a jobber-length twist drill bit designed for general-purpose drilling in a wide range of materials. Measuring 0.5 inches in diameter with a 6-inch overall length, it is ground from high-speed steel and coated with a steam oxide finish that provides light corrosion resistance and reduces friction during cutting. The 135-degree split point geometry reduces walking on entry and requires no center punch on most surfaces. The right-hand spiral flute configuration evacuates chips efficiently during drilling. This bit is suited for use by machinists, maintenance technicians, pipefitters, and other trades requiring reliable hole-making in ferrous and non-ferrous stock.

The 5997604 is built for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium in production and maintenance environments. Its regular spiral and tapered web with web thinning make it effective across a broad range of workpiece hardness levels. The straight cylindrical shank seats securely in standard three-jaw drill chucks on handheld drills, drill presses, and CNC drilling machines. At a 9xD flute-to-diameter ratio, it provides adequate flute length for most through-hole and blind-hole applications in jobber-length reach.

Key Features

• 135-degree split point reduces bit walking and eliminates the need for a center punch on most materials
• Steam oxide coating provides light lubricity and corrosion resistance during use
• High-speed steel construction retains edge hardness through heat generated in production drilling
• Web-thinned tapered web lowers thrust requirements and improves chip clearance
• Right-hand, 2-flute spiral configuration for efficient chip evacuation
• Straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as an OEM-style replacement or direct-use jobber-length drill bit for general drilling applications in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. Conforms to ANSI standards and NAS 907 specification. Part of the R10B-R15B-R18B series.

Installation Notes

Install and remove drill bits only with the drill or drill press powered down and the chuck key removed from the chuck. Secure the straight shank fully in the chuck jaws and tighten evenly before drilling. Use appropriate cutting fluid when drilling stainless steel, superalloys, or titanium to manage heat and extend edge life. Follow applicable shop safety practices and ANSI B11 machine tool standards when operating drill presses or power drills.