Precision Twist Drill 5998638 3/32 in Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998638 is a screw machine length drill bit designed for high-speed steel cutting applications in metal fabrication, machining, and maintenance environments. At 3/32 inch (0.0938 inches) in diameter with a 118-degree point angle, this bit delivers accurate hole placement in tight-tolerance work. The web-thinned, tapered web construction reduces thrust requirements at the point, improving penetration in harder materials. Overall length is 1-3/4 inches with a 3/4-inch flute length, making it well suited for use in drill presses, CNC machines, and hand-held power tools where a compact stub-length bit is required.

This drill bit is rated for use on titanium as its primary workpiece material, while the high-speed steel construction supports a broad range of metals including mild steel, aluminum, and similar materials. The straight-cylindrical shank fits standard chucks without modification. Its screw machine (stub) length provides added rigidity over jobber-length bits, reducing deflection in close-quarters drilling and high-production machining setups. Sold individually, with a minimum order quantity of 12 units per order. Part of the Series R40 line, built to ANSI standards.

Key Features

• 3/32 inch (0.0938 inches) diameter with 118-degree standard point angle for general-purpose metal drilling
• Web-thinned, tapered web reduces cutting thrust and improves penetration on harder workpiece materials
• Screw machine (stub) length at 1-3/4 inches overall provides increased rigidity and reduced deflection
• High-speed steel construction with bright/uncoated finish for general-purpose, non-coated applications
• Right-hand spiral flute geometry with 2.5xD flute-to-diameter ratio for efficient chip evacuation
• Straight-cylindrical shank for compatibility with standard drill chucks
• Manufactured to ANSI standards, Series R40

Compatibility

Designed as a general-purpose screw machine length drill bit rated for titanium as the primary workpiece material, suitable for use with standard drill chucks accepting a straight-cylindrical shank in drill press, CNC, and hand-held power tool applications.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with drill press and power tool safety practices. Ensure the machine is powered down and the chuck is fully secured before inserting or removing the bit. Use appropriate cutting fluid or coolant as required by the workpiece material, noting that this bit does not feature coolant-through capability. Inspect the cutting edges for wear or damage before each use and replace if chipping or dulling is observed.