Precision Twist Drill 5998743 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5998743 is a taper length drill bit designed for general-purpose drilling in soft and non-ferrous metals. Manufactured from high speed steel with a bright, uncoated finish, this bit features a 118-degree standard point angle and a right-hand spiral flute for efficient chip evacuation. The web-thinned, tapered web configuration reduces thrust requirements at the point, making it well-suited for production and maintenance drilling applications. At 0.1875 inches in diameter with a 5.75-inch overall length, this bit belongs to the R51FS series and conforms to ANSI standards.

This drill bit is intended for use in aluminum, aluminum alloy, copper, magnesium, and magnesium alloy. The taper length design provides additional flute length compared to jobber-length bits, making it appropriate for applications requiring deeper hole depths or improved chip clearance. The cylindrical shank fits standard drill chucks without adapters, and the fast spiral flute type supports efficient cutting in soft, gummy materials common in light manufacturing and mechanical service environments. Machinists, maintenance technicians, and tool-and-die professionals are the typical end users.

Key Features

• High speed steel construction for general-purpose metal drilling
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Fast spiral flute promotes chip evacuation in aluminum, copper, and magnesium alloys
• Bright, uncoated finish suits non-ferrous and soft metal applications
• 3.375-inch flute length with a 6xD flute-length-to-diameter ratio for extended reach
• Cylindrical shank with no threading for direct chuck mounting
• Conforms to ANSI standards; R51FS series

Compatibility

Designed for drilling aluminum, aluminum alloy, copper, magnesium, and magnesium alloy workpieces. Fits any standard drill chuck accepting a 0.1875-inch cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with proper drilling speeds and feeds for non-ferrous metals. Secure the workpiece firmly before drilling and ensure the chuck is tightened fully on the cylindrical shank before operation. Do not exceed the recommended surface footage for high speed steel tooling in the material being drilled. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point shows signs of damage.