Precision Twist Drill 5998833 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998833 is a screw machine length drill bit designed for high-performance drilling in tight-clearance and production environments. 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 with web thinning for improved chip evacuation and reduced thrust. The straight cylindrical shank seats securely in standard drill chucks. At 0.154 inches in diameter and 2-1/16 inches overall length, it is sized for applications where a jobber-length bit would be too long to fit or too flexible to hold tolerance.

This bit is suited for production drilling, CNC drilling, and bench drill press work where stub-length rigidity is required. The Series R41 designation places it in a general-purpose high-performance category rated for use in metals including titanium. The 1-inch flute length at a 2.5xD flute-to-diameter ratio keeps the cutting geometry compact and stable. Machinists, tool and die technicians, and maintenance mechanics working in metalworking shops or fabrication environments are the primary users of this style of bit.

Key Features

• 0.154 inch diameter, wire size 23, for precise hole sizing in metal fabrication
• Screw machine (stub) length at 2-1/16 inches overall for maximum rigidity in short-reach setups
• High speed steel construction rated for general-purpose and high-performance metal drilling including titanium
• 118-degree standard point angle with web thinning reduces walking and cutting thrust
• Right-hand spiral flute promotes efficient chip removal from the hole
• Bright uncoated finish on straight cylindrical shank for direct chuck compatibility without adapter

Compatibility

Designed as an OEM-style replacement and standard production drill bit for use in any drill press, CNC machining center, or handheld drill accepting a straight cylindrical shank. Conforms to ANSI standards as noted in the Series R41 specification.

Installation Notes

Install in a standard drill chuck rated for straight cylindrical shanks and tighten securely with a chuck key before operation. Ensure the workpiece is clamped or fixtured before drilling to prevent rotation and maintain hole position accuracy. When drilling hard metals such as titanium, use appropriate cutting fluid to extend bit life and reduce heat buildup. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.