Precision Twist Drill 5998327 Jobber Drill Bit Wire 20

Product Description

The PRECISION TWIST DRILL 5998327 is a jobber-length drill bit in wire gauge size 20 (0.1610 inches decimal) designed for general-purpose production and maintenance drilling in metal. Built from high speed steel with a steam oxide coating, this bit runs a 118-degree standard point angle and a two-flute right-hand spiral configuration. The web-thinned tip reduces thrust and improves chip evacuation at entry. At 3.25 inches overall length with a 2.125-inch flute, it fits standard keyless and keyed chucks without adapters. Licensed machinists, tool-and-die technicians, and maintenance mechanics reach for this size in daily hole-making operations.

This bit is suited for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. The regular spiral and tapered web geometry make it a reliable choice for both manual drill press work and CNC machine setups requiring a straight-cylindrical shank. Maximum rated drilling depth is 2.125 inches, consistent with a 13xD flute-to-diameter ratio. It conforms to ANSI standards and is classified under Series R10-R15-R18 for jobber-length tooling.

Key Features

• Wire size 20 diameter: 0.1610 inches decimal for precise hole sizing
• High speed steel construction with steam oxide coating for wear resistance and reduced friction
• 118-degree standard point angle for general-purpose entry on a wide range of metals
• Web-thinned, tapered-web design lowers drilling thrust and improves chip clearance
• Right-hand cut, two-flute regular spiral flute for consistent chip evacuation
• Straight-cylindrical shank fits standard drill chucks without sleeves or adapters
• ANSI-conforming jobber-length geometry: 3.25 inches OAL, 2.125-inch flute

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any drill press, hand drill, or CNC spindle accepting a 0.1610-inch straight-cylindrical shank. Rated for use in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium workpieces.

Installation Notes

Secure the shank fully in the chuck and verify concentricity before beginning a cut. Machinists and maintenance technicians should apply appropriate cutting fluid when drilling stainless steel, superalloys, or titanium to manage heat and extend tool life. Reduce feed pressure near breakthrough to prevent the bit from grabbing and to maintain hole quality. Inspect the point and cutting edges for wear or chipping after extended use on hard materials before reusing.