Precision Twist Drill 5998714 Jobber Drill Bit 27/64

Product Description

The PRECISION TWIST DRILL 5998714 is a jobber-length twist drill bit designed for general-purpose hole-making in a wide range of materials. It measures 27/64 inch (0.4219 inches) in diameter with a 5.375-inch overall length and a 3.9375-inch flute length. Constructed from high-speed steel with a steam oxide coating, it offers solid resistance to heat and wear during drilling operations. The 118-degree standard point angle and web-thinned, tapered web configuration reduce thrust and improve chip evacuation. This bit suits production drilling environments and tool-crib stock for machinists, maintenance technicians, and fabricators.

This drill bit is rated for use in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium, covering a broad range of workpiece materials common in metalworking and industrial maintenance. The two-flute spiral design with right-hand cut runs in standard drill presses, CNC machining centers, and handheld power drills. The straight-cylindrical shank at 0.4219 inches diameter seats securely in standard keyless or keyed chucks. It belongs to the Series R10-R15-R18 family and conforms to ANSI standards.

Key Features

• 27/64 inch diameter high-speed steel construction handles steel, stainless steel, cast iron, and non-ferrous metals
• Steam oxide coating improves heat resistance and reduces friction during drilling
• 118-degree standard point with web-thinned, tapered web lowers thrust and improves chip flow
• 3.9375-inch flute length supports a maximum drilling depth of 3.9375 inches
• Two-flute regular spiral with right-hand cut for use in conventional drilling setups
• Straight-cylindrical shank fits standard drill press and handheld chucks without adapters
• Conforms to ANSI specification; Series R10-R15-R18

Compatibility

Designed as a general-purpose jobber-length replacement drill bit compatible with any standard chuck accepting a 0.4219-inch straight-cylindrical shank, including drill presses, lathes, and handheld power drills used in metalworking and industrial maintenance applications.

Installation Notes

This drill bit is installed by machinists and maintenance technicians using standard keyed or keyless drill chucks. Always power down and de-energize the drill press or machine spindle before changing tooling. Secure the shank fully in the chuck jaws to prevent slippage under load. Use appropriate cutting fluid when drilling steel or stainless steel to extend tool life and maintain hole quality.