Precision Twist Drill 5998977 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5998977 is a taper length drill bit in the R51FS series, designed for precision drilling in soft to medium metals. Built from high-speed steel with a bright, uncoated finish, it features a 118-degree standard point angle and a spiral, web-thinned flute configuration for efficient chip evacuation. The 1/16-inch diameter bit has an overall length of 3 inches and a flute length of 1-3/4 inches, giving it extended reach compared to jobber-length equivalents. Right-hand cut with a cylindrical shank, it is suited for use in drill presses, CNC drilling setups, and hand-held power drills in trade and light industrial applications.

This bit is intended for drilling aluminum, aluminum alloy, copper, magnesium, and magnesium alloy. The taper length format provides added reach for applications where standard jobber-length bits fall short, such as deep-hole work in fabrication, mechanical, plumbing rough-in, and electrical panel work. The R51FS series is built to ANSI standards, making it appropriate for consistent performance in general-purpose production and maintenance environments.

Key Features

• High-speed steel construction rated for aluminum, copper, magnesium, and related alloys
• 118-degree standard point angle for accurate entry on flat and curved surfaces
• Web-thinned, tapered web configuration reduces thrust and improves chip flow
• Fast spiral flute type promotes rapid chip evacuation in soft metals
• Taper length OAL of 3 inches with 1-3/4-inch flute length for extended reach drilling
• ANSI-compliant general-purpose grade suitable for production and maintenance use

Compatibility

Designed for use in materials including aluminum, aluminum alloy, copper, magnesium, and magnesium alloy. Compatible with standard drill chucks accepting a 1/16-inch cylindrical shank. Suitable for drill presses, CNC machines, and portable power drills used in general-purpose drilling applications.

Installation Notes

Install in a properly rated drill chuck and verify shank seating before operation. Secure the workpiece firmly before drilling to prevent walking on entry, particularly in soft metals. Use appropriate cutting fluid or lubrication when drilling copper and aluminum alloys to extend tool life and improve finish quality. Inspect the bit for wear or chipping before each use and replace if the cutting edges are dull or damaged.