Precision Twist Drill 5995584 No. 8 Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5995584 is a No. 8 wire-size jobber-length drill bit designed for general-purpose drilling in demanding materials. Manufactured from high speed steel with a bronze coating, it features a 135-degree split-point angle and a web-thinned, tapered-web construction that reduces walking on contact and lowers thrust requirements. The straight-cylindrical shank measures 0.1990 inches in diameter. With an overall length of 3.625 inches and a spiral flute length of 2.4375 inches, this bit suits standard drill chucks and right-angle drill setups common in production and maintenance environments. Licensed tradespeople and machinists select this bit for drilling through steel, stainless steel, cast iron, and superalloys including titanium.

This drill bit is built for right-hand cutting with regular-spiral, two-flute geometry and a maximum drilling depth of 2.4375 inches. It fits applications across metalworking, fabrication, and maintenance where wire-size precision is required. The No. 8 wire-gauge designation corresponds to a decimal diameter of 0.1990 inches, making it a common choice when working to close-tolerance hole specifications in steel and stainless steel assemblies. The Series HX10-HX15-HX18 designation covers the Precision Twist Drill bronze-coated high speed steel jobber family, dimensioned to ANSI standards.

Key Features

• 135-degree split point reduces bit walk and lowers feed pressure on entry
• Web-thinned, tapered-web geometry improves chip evacuation in deep holes
• Bronze coating provides lubricity and surface hardness for extended tool life in ferrous materials
• No. 8 wire size, 0.1990-inch decimal diameter for close-tolerance hole work
• Right-hand cutting with regular two-flute spiral; compatible with standard straight-shank chucks
• Dimensioned to ANSI specification; Series HX10-HX15-HX18

Compatibility

Designed as a general-purpose jobber-length drill bit for steel, stainless steel, cast iron, and superalloys including titanium. Compatible with any standard drill chuck accepting a 0.1990-inch straight-cylindrical shank. Part of the PRECISION TWIST DRILL Series HX10-HX15-HX18.

Installation Notes

Installation is performed by machinists, tool-and-die tradespeople, or maintenance mechanics using a drill press, CNC machining center, or hand drill with an appropriate chuck capacity. Secure the shank fully in the chuck before operating. Coolant-through is not supported on this bit; use appropriate cutting fluid applied externally when drilling stainless steel, cast iron, or superalloys to manage heat buildup. Inspect the cutting edges for wear before each use and replace when point geometry is compromised to maintain hole-size accuracy.