Precision Twist Drill 5998932 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998932 is a screw machine length drill bit designed for high-performance drilling in metalworking and industrial applications. Built from high speed steel with a bright, uncoated finish, it features a 0.277-inch diameter, a 118-degree standard point angle, and a web-thinned, tapered web construction that reduces thrust and improves chip evacuation. The straight-cylindrical shank seats securely in standard drill chucks. The overall length is 2-11/16 inches with a 1-1/2-inch flute length, and the bit weighs approximately 0.04 pounds. Machinists and trade professionals install this bit in screw machine operations requiring consistent, close-tolerance hole production.

This drill bit is suited for right-hand spiral flute drilling on a range of workpiece materials, with the manufacturer citing titanium as the primary workpiece material. The screw machine length format offers a shorter, stiffer profile compared to jobber-length bits, making it well-suited for CNC machining centers, turret lathes, and screw machine setups where rigidity and runout control are critical. The 2.5xD flute-to-diameter ratio supports efficient chip clearance in moderate-depth holes. It is sold and packaged as a single unit.

Key Features

• 0.277-inch (Letter J) diameter with 118-degree standard point angle for general-purpose hole entry
• Web-thinned, tapered web construction reduces drilling thrust and improves chip flow
• High speed steel construction rated for high-performance cutting applications
• Screw machine length profile provides added rigidity over jobber-length alternatives
• Straight-cylindrical shank compatible with standard drill chucks and collet systems
• Right-hand cut with regular spiral flute geometry for consistent chip evacuation

Compatibility

Designed as a screw machine length replacement or production drill bit for use in standard drill chucks and collet holders accepting a straight-cylindrical shank; part of the Series R42 product line and conforms to ANSI standards.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trade professionals familiar with rotating cutting tools. Secure the shank fully in the chuck or collet and verify runout before operation. Always power down and lock out the machine before changing tooling. Follow applicable ANSI and shop safety guidelines for speeds, feeds, and coolant use appropriate to the workpiece material.