Precision Twist Drill 5998872 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998872 is a screw machine length drill bit designed for high-performance drilling in metal fabrication and machining applications. Manufactured from high speed steel with a bright uncoated finish, this bit features a 118-degree standard point angle and a web-thinned, tapered web configuration for improved chip clearance and reduced thrust. The straight-cylindrical shank seats securely in standard drill chucks. At 0.113 inches in diameter and 1-7/8 inches overall length, it is engineered for use in tight-clearance or short-reach drilling situations where a jobber-length bit would be impractical.

This drill bit is suited for light machining, sheet metal, and precision drilling operations in industrial and trade environments. The Series R41 designation identifies it as a general purpose, high performance bit rated to ANSI standards. With a flute-to-diameter ratio of 2.5xD and a 7/8-inch flute length, it handles moderate-depth holes efficiently. The primary workpiece material rating includes titanium, making it appropriate for harder nonferrous metals as well as general steel and aluminum work. Licensed machinists, maintenance technicians, and tool-room professionals are the typical end users.

Key Features

• 0.113 inch diameter, wire size 33, for precision bore sizing
• High speed steel construction for durability across a range of metals
• 118-degree standard point angle with web-thinned, tapered web for lower thrust and easier starting
• Screw machine length at 1-7/8 inches overall for short-reach and confined-space drilling
• Right-hand cut spiral flute design promotes efficient chip evacuation
• Meets ANSI standards, Series R41 designation

Compatibility

Designed as a general purpose screw machine length drill bit compatible with standard drill chucks and CNC or manual drill press setups that accept straight-cylindrical shank tooling.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with proper drill press or machine tool operation. Secure the shank fully in the chuck and verify concentricity before beginning a cut. Always wear appropriate eye protection and follow applicable shop safety procedures. Do not exceed the rated speed range for the material being drilled, and allow adequate chip clearing during the cut.