Precision Twist Drill 5998043 Jobber Drill Bit 55 Hss

Product Description

The PRECISION TWIST DRILL 5998043 is a wire gauge size 55 jobber length drill bit designed for general-purpose drilling in a wide range of materials. Manufactured from high speed steel with a bright uncoated finish, this bit measures 1.875 inches in overall length with a 0.875-inch spiral flute. The 118-degree standard point angle provides reliable starting and consistent hole geometry. It features a right-hand cut with a regular spiral and a straight-cylindrical shank. The tapered web configuration with web thinning reduces thrust requirements during drilling. Licensed tradespeople and machinists use this bit for production and maintenance drilling tasks.

This drill bit is suited for use on steel, cast iron, non-ferrous metals, superalloys, and titanium. Its 0.0520-inch decimal diameter makes it a common selection for tapping, reaming prep, and precision hole work in both shop and field environments. The two-flute design clears chips efficiently at this small diameter, and the 17xD flute-to-diameter ratio supports controlled penetration in deeper bores up to the full 0.875-inch maximum drilling depth. It follows ANSI standards and fits into standard drill chucks or collets that accept a 0.0520-inch straight shank.

Key Features

• Wire gauge size 55, 0.0520-inch decimal diameter for precise small-hole drilling
• 118-degree standard point angle with web-thinned, tapered web for reduced thrust
• High speed steel construction handles steel, cast iron, non-ferrous metals, superalloys, and titanium
• Right-hand cut, regular spiral, two-flute design promotes efficient chip evacuation
• Straight-cylindrical shank compatible with standard chucks and collets
• ANSI-compliant jobber length in Series R10H-R18H

Compatibility

Designed as an OEM-style general-purpose replacement or stock drill bit for any standard drill press, CNC machine, or hand drill accepting a 0.0520-inch straight-cylindrical shank. Series R10H-R18H as noted in supplier specifications.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with small-diameter drill bits. Secure the workpiece firmly before drilling to prevent deflection or bit breakage at this diameter. Use appropriate cutting fluid or coolant for steel and superalloy applications to extend tool life, noting that this bit does not support coolant-through delivery. Follow applicable shop safety standards and ensure the drill chuck or collet is rated for the shank diameter before operation.