Precision Twist Drill 5998944 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998944 is a screw machine length drill bit designed for high-performance drilling in demanding trade and industrial applications. Ground from high speed steel with a bright, uncoated finish, it features a 118-degree standard point angle, right-hand cutting direction, and a regular spiral flute configuration with a tapered web. The straight-cylindrical shank provides secure chuck engagement, and the web-thinned tip reduces entry force and walking at the start of a cut. At 0.295 inches in diameter and 2.75 inches overall length, this bit fits compact drilling setups where stub-length rigidity is required.

Screw machine length drill bits are specified when reduced overhang and increased rigidity matter, such as in drill press work, CNC setups, and tight-clearance applications. This Series R42 bit carries an ANSI designation and is suited for general-purpose drilling in metals including titanium, making it appropriate for machinists, pipefitters, and HVAC sheet metal technicians who require consistent hole geometry with minimal deflection. The 1.5625-inch flute length supports chip evacuation in through-hole and blind-hole operations at moderate depths.

Key Features

• High speed steel construction for durability in metal drilling applications
• 118-degree standard point angle with web-thinned tip for reduced thrust and cleaner entry
• Right-hand cut with regular spiral flute for efficient chip removal
• Straight-cylindrical shank for compatibility with standard drill chucks
• Screw machine length provides added rigidity over jobber-length bits
• ANSI-compliant Series R42 build for consistent dimensional tolerances

Compatibility

Designed as a general-purpose screw machine length drill bit for use in standard three-jaw drill chucks and collet systems accepting a straight-cylindrical shank at 0.295 inches diameter.

Installation Notes

This bit is installed by machinists and trade technicians using standard drill presses, hand drills, or CNC equipment. Secure the shank fully in the chuck before operation and confirm the workpiece is clamped to prevent movement. Disconnect power or engage the safety lockout on any powered equipment before changing bits. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole quality.