Precision Twist Drill 5999097 Jobber Drill Bit No 51

Product Description

The PRECISION TWIST DRILL 5999097 is a jobber-length drill bit sized to wire gauge No. 51, with a decimal diameter of 0.0670 inches. Machined from high speed steel (HSS) with a bright uncoated finish, it features a standard 118-degree split point, a regular spiral flute, and a straight-cylindrical shank. Overall length is 2 inches, with a 1-inch flute length and a maximum drilling depth of 1 inch. This is a general-purpose bit intended for production and maintenance drilling operations performed by machinists, tool-and-die workers, and metalworking tradespeople.

This bit is suited for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. The 15xD flute-to-diameter ratio provides chip clearance in deep-hole applications relative to the bit diameter. Typical applications include pilot holes, through-holes, and precision drilling in sheet metal and machined components where a No. 51 wire gauge diameter is specified.

Key Features

• Wire gauge No. 51 diameter: 0.0670 inches for precise hole sizing
• 118-degree standard point angle for general-purpose drilling in metallic workpieces
• High speed steel construction with bright uncoated finish
• Right-hand cut, regular spiral flute with web-thinned, tapered web configuration
• Straight-cylindrical shank compatible with standard drill chucks
• Meets ANSI specification standards; Series R10P-R15P-R18P

Compatibility

Designed as a general-purpose jobber-length drill bit for use with standard drill chucks accepting a 0.0670-inch straight-cylindrical shank, compatible across drill presses, CNC machines, and handheld power drills used in metalworking applications.

Installation Notes

Install and remove this bit with the drill or machine fully powered off and secured. Seat the straight-cylindrical shank fully into the chuck and tighten with a chuck key before operation. Use appropriate cutting fluid or coolant for stainless steel, superalloys, and titanium to extend bit life and maintain hole quality. Inspect the cutting edge for wear before each use, as small-diameter HSS bits are susceptible to breakage if run at incorrect speeds or feeds.