Precision Twist Drill 5999385 Jobber Drill Bit 71

Product Description

The PRECISION TWIST DRILL 5999385 is a wire gauge size 71 jobber length drill bit designed for general-purpose drilling in metal fabrication, maintenance, and light manufacturing applications. Built from high speed steel with a bright uncoated finish, the bit runs a standard 118-degree point angle and a two-flute right-hand spiral configuration. Overall length is 1.25 inches with a 3/8-inch flute length, making it well suited for close-tolerance small-diameter work. The straight cylindrical shank measures 0.026 inches in diameter, matching the drill diameter for direct chuck mounting without adapters.

This bit is intended for drilling into steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. It fits standard drill chucks on benchtop drill presses, hand drills, and CNC machining centers where small wire gauge sizes are required. Machinists, tool and die workers, maintenance technicians, and fabricators reach for this size when drilling pilot holes, tapping preparation holes, or performing intricate small-bore work. The R18P series designation places it within the PRECISION TWIST DRILL R10P-R15P-R18P family of jobber drill bits.

Key Features

• Wire gauge size 71 with 0.026-inch decimal diameter for close-tolerance small-bore drilling
• 118-degree standard point angle with web-thinned, tapered web for improved chip clearance
• High speed steel construction handles steel, stainless steel, cast iron, and superalloys
• Two-flute regular spiral design promotes consistent chip evacuation in short-depth holes
• Bright uncoated finish suitable for general-purpose use without coolant-through requirement
• ANSI-compliant straight cylindrical shank for compatibility with standard drill chucks

Compatibility

Designed as an OEM-style general-purpose jobber drill bit within the PRECISION TWIST DRILL R10P-R15P-R18P series, compatible with standard drill chucks accepting straight cylindrical shanks at 0.026 inches diameter.

Installation Notes

Machinists and fabricators should secure the shank fully in the chuck and verify runout before drilling. Power down the drill press or disconnect the hand tool before bit changes. At this small diameter, use low feed pressure and moderate spindle speed to prevent bit breakage, and clear chips frequently. No coolant-through capability is present on this bit, so a light cutting oil applied manually is recommended when drilling hard or stainless steel.