Precision Twist Drill 5998357 Jobber Drill Bit No 29

Product Description

The PRECISION TWIST DRILL 5998357 is a jobber-length twist drill bit sized to wire gauge No. 29, with a decimal diameter of 0.1360 inches. Manufactured from high speed steel with a steam oxide coating, this bit is built for general-purpose drilling in metal fabrication, maintenance, and production environments. It features a 118-degree standard point angle, a regular spiral with two flutes, and a web-thinned, tapered web configuration that reduces thrust during entry. The overall length is 2.875 inches (2-7/8 inches) with a flute length of 1.75 inches (1-3/4 inches). Licensed trade professionals and machining technicians use this bit for accurate, clean through-holes in a wide range of workpiece materials.

This drill bit is suited for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. It fits standard drill chucks and is appropriate for use in hand drills, drill presses, and CNC machining centers wherever a straight-cylindrical shank is accepted. The 13xD flute-to-diameter ratio supports moderate-depth drilling up to 1.75 inches. It is a solid choice for general-purpose hole-making tasks in both shop and field service settings. The Series R10-R15-R18 designation indicates compatibility with standard jobber-length specifications per ANSI standards.

Key Features

• Wire gauge No. 29 sizing at 0.1360 inches decimal diameter for precise hole tolerances
• High speed steel construction with steam oxide coating for improved lubricity and corrosion resistance
• 118-degree standard point angle for general-purpose metal drilling
• Web-thinned, tapered web reduces cutting thrust and improves chip evacuation
• Right-hand cut, regular spiral with two flutes for efficient chip clearing
• ANSI-compliant jobber-length design for broad compatibility with standard toolholding

Compatibility

Designed as an ANSI-standard jobber-length drill bit compatible with any straight-cylindrical shank chuck accepting a 0.1360-inch shank diameter. Conforms to Series R10-R15-R18 specifications.

Installation Notes

Installation and use should be performed by a qualified machinist or tradesperson familiar with rotary cutting tools. Secure the shank fully in the chuck before operating and verify chuck key removal prior to starting the machine. Use appropriate cutting fluid or coolant when drilling stainless steel, superalloys, or titanium to extend tool life, as coolant-through is not available on this bit. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection based on workpiece material.