Precision Twist Drill 6002473 Jobber Drill Bit No. 21

Product Description

The PRECISION TWIST DRILL 6002473 is a jobber-length drill bit sized to wire gauge No. 21, with a decimal diameter of 0.1590 inches. It is ground from high speed steel with a bright, uncoated finish and features a standard 118-degree point angle with web thinning for easier entry. The two-flute spiral design provides a 9xD flute-to-diameter ratio, delivering efficient chip evacuation during general-purpose drilling. At 2.5 inches overall length with a 1.375-inch flute length, this bit is proportioned for hand drills, drill presses, and CNC drill cycles where a straight-cylindrical shank is required.

This bit is suited for production and maintenance drilling in steel, stainless steel, cast iron, non-ferrous metals, and hard materials. Right-hand cut geometry is standard for conventional drilling operations in fabrication shops, machine shops, and field service environments. It carries ANSI standards compliance and belongs to the Series D33F-D33W-D33L-D33M family, making it a recognized production-grade option for shops that specify wire-gauge drill sets. A single-piece package quantity makes it straightforward to stock as a replacement or add to a working set.

Key Features

• Wire gauge No. 21 size — 0.1590 inches decimal diameter
• 118-degree standard point angle with web-thinned, tapered web for reduced thrust
• High speed steel construction with bright, uncoated finish
• Regular spiral, two-flute design — 1.375 inches maximum drilling depth
• Straight-cylindrical shank, 0.1590 inches diameter, 1.125 inches shank length
• Right-hand cut — compatible with conventional clockwise-rotation drilling
• ANSI-compliant — Series D33F-D33W-D33L-D33M

Compatibility

Designed as a general-purpose jobber-length replacement drill bit for use in standard drill chucks accepting straight-cylindrical shanks across hand drills, drill presses, and CNC drilling centers. Rated for use in steel, stainless steel, cast iron, non-ferrous metals, and hard materials per workpiece material codes P, M, K, N, and H.

Installation Notes

Install in a properly sized drill chuck and verify the shank is fully seated and securely tightened before operation. Ensure the workpiece is clamped or fixtured to prevent movement during drilling. Select an appropriate cutting speed and feed rate for the target material — excessive feed pressure on hard materials can chip the point. Coolant-through operation is not supported on this bit; apply cutting fluid externally when drilling stainless steel or hard alloys.