Precision Twist Drill 5998776 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998776 is a screw machine length drill bit designed for high-performance drilling in demanding shop and field applications. Built from high-speed steel with a bright, uncoated finish, it measures 0.1935 inches in diameter (wire size 10) and carries a standard 118-degree drill point angle. The overall length is 2.25 inches with a flute length of 1.1875 inches, making it a compact stub-length tool suited for drilling in tight clearance situations. A web-thinned, tapered web construction reduces thrust requirements at the point and improves chip evacuation. This bit is part of the Series R41 lineup and conforms to ANSI standards.

This drill bit is rated as a high-performance general-purpose cutting tool with a primary workpiece material designation of titanium, indicating suitability for harder, more demanding materials. Its right-hand spiral flute geometry and straight cylindrical shank make it compatible with standard drill chucks and quick-change holders. The screw machine length format is commonly used in CNC machining centers, turret lathes, drill presses, and hand-held power drilling operations where reduced overhang improves rigidity and accuracy. The 2.5xD flute-to-diameter ratio supports efficient chip removal without compromising tool stiffness.

Key Features

• Screw machine (stub) length for improved rigidity in tight or high-precision drilling setups
• High-speed steel construction rated for titanium and other demanding workpiece materials
• Web-thinned, tapered web reduces entry thrust and improves point centering
• 118-degree standard point angle suitable for general-purpose drilling across a wide range of materials
• Bright, uncoated finish for easy visual wear inspection
• Conforms to ANSI standards; Series R41 designation

Compatibility

Designed as an OEM-style replacement or standard-stock drill bit for use in straight-shank drill chucks across CNC machining centers, drill presses, and hand-held power tools. Fits drill bit size range of 0.1500 to 0.2000 inches decimal inch category.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or trade professionals familiar with rotary cutting tools. Ensure the drill chuck is fully tightened and the workpiece is properly secured before operation. Inspect the cutting edge for wear or chipping before each use, and replace the bit if the point or flute geometry is compromised. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed rates appropriate to the workpiece material.