Precision Twist Drill 5998845 Drill Bit Letter D Hss

Product Description

The PRECISION TWIST DRILL 5998845 is a jobber-length, high speed steel drill bit sized to Letter D (0.2460 inches) with a standard 118-degree split-point angle and a bright, uncoated finish. It is designed for general-purpose drilling in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. The two-flute spiral design with a tapered, web-thinned web promotes chip evacuation and reduces thrust during entry. The straight-cylindrical shank seats securely in standard drill chucks. This bit is manufactured to ANSI standards and belongs to the R10P-R15P-R18P series, making it a reliable option for machinists, maintenance technicians, pipefitters, and other trade professionals who require consistent, repeatable hole quality.

This bit is suited for drilling operations in both shop and field environments where a standard jobber-length tool is appropriate. The 2.75-inch flute length accommodates drilling depths up to 2.75 inches, covering the majority of through-hole and blind-hole applications encountered in fabrication, mechanical maintenance, and general metalworking. Its general-purpose grade and uncoated finish make it compatible with both dry and lubricated cutting conditions on a wide range of workpiece materials including steel, stainless steel, cast iron, non-ferrous metals, and superalloys.

Key Features

• Letter D size — 0.2460 inches decimal equivalent for precise hole sizing
• 118-degree standard point angle with web-thinned, tapered web for reduced thrust and easier starting
• High speed steel construction handles steel, stainless steel, cast iron, non-ferrous metals, and superalloys
• Two-flute regular spiral flute promotes efficient chip removal
• Straight-cylindrical shank fits standard drill chucks without adapters
• Manufactured to ANSI standards — general-purpose grade, right-hand cut

Compatibility

Designed as a general-purpose jobber-length drill bit for use in standard keyed or keyless drill chucks accepting a 0.2460-inch straight-cylindrical shank. Suitable for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium in shop or field applications.

Installation Notes

Installation and use of this drill bit is typically performed by machinists, millwrights, pipefitters, or maintenance technicians using a drill press, hand drill, or magnetic base drill. Secure the straight-cylindrical shank firmly in the chuck before operation and verify the workpiece is clamped or fixtured to prevent movement. Apply cutting fluid or coolant as appropriate for the workpiece material to extend tool life and improve hole finish. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point is damaged.