Precision Twist Drill 5998587 11/64 in Hss Screw Machine Drill

Product Description

The PRECISION TWIST DRILL 5998587 is a screw machine length drill bit designed for high-performance drilling in metal and other demanding materials. Built from high speed steel (HSS) with a bright, uncoated finish, it measures 11/64 inch (0.1719 inches) in diameter and carries a 118-degree standard point angle. The shorter screw machine length body — 2.125 inches overall — gives machinists and toolroom technicians better rigidity in drill press, turret lathe, and CNC applications where stub-length tooling is preferred. Web thinning reduces thrust force at the point and improves chip clearance on entry.

This bit is suited for production drilling in ferrous and non-ferrous metals, including titanium as noted by the manufacturer. The Series R40 designation identifies it as a general-purpose HSS line built to ANSI standards. It is commonly used in machine shop environments, maintenance and repair operations, and trade applications where a compact drill profile reduces deflection and improves hole accuracy in short-depth bores. The straight-cylindrical shank accepts standard drill chucks without adapters.

Key Features

• 11/64 inch (0.1719 inches) diameter with 118-degree standard point angle
• High speed steel construction with bright, uncoated finish for general-purpose use
• Screw machine (stub) length — 2.125 inches overall — for added rigidity
• Right-hand cut with regular spiral flute and 1.0625-inch flute length
• Web-thinned, tapered web configuration reduces entry thrust and improves chip flow
• Straight-cylindrical shank fits standard drill chucks without modification

Compatibility

Designed as an OEM-style replacement or direct-use screw machine length drill bit for standard drill chucks accepting straight-cylindrical shanks in the 11/64 inch diameter range, conforming to ANSI standards.

Installation Notes

Installation is performed by machinists and toolroom technicians using standard drill press, lathe, or CNC equipment. Secure the shank fully in the chuck and verify runout before drilling. Ensure the workpiece is clamped securely and appropriate cutting fluid is applied when drilling titanium or hardened metals to extend tool life. Inspect the cutting edges for wear or chipping before each use.