Precision Twist Drill 5998710 Jobber Drill Bit 23/64 in

Product Description

The PRECISION TWIST DRILL 5998710 is a jobber-length twist drill bit designed for general-purpose drilling in a wide range of materials. Built from high speed steel with a steam oxide coating, it measures 23/64 inches (0.3594 inches decimal) in diameter and carries a 118-degree standard point angle. The overall length is 4.875 inches with a 3.5-inch spiral flute length. The web-thinned, tapered web design reduces thrust and helps the point start accurately. Licensed trades and maintenance professionals reach for this bit when a reliable, shop-standard jobber drill is needed for everyday hole-making tasks.

This bit is suited for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. The Series R10 designation places it in a well-established family of general-purpose jobber drills. It is appropriate for use in hand drills, drill presses, and CNC equipment where a straight-cylindrical shank is accepted. Applications include fabrication shops, maintenance and repair operations, and field service work across the HVAC, plumbing, and electrical trades.

Key Features

• High speed steel construction with steam oxide coating for lubricity and corrosion resistance
• 118-degree standard point angle for general-purpose work across multiple material types
• Web-thinned, tapered web reduces drilling thrust and improves point starting
• Right-hand cut, regular spiral flute with 10xD flute-to-diameter ratio for efficient chip evacuation
• Straight-cylindrical shank (23/64 inches diameter) compatible with standard drill chucks
• Meets ANSI specification standards

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any drill press, hand drill, or CNC spindle accepting a straight-cylindrical shank of 23/64 inches (0.3594 inches decimal). Suitable for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium per ISO material codes P, M, K, N, and S.

Installation Notes

Secure the shank fully in the drill chuck and verify concentricity before operation. Always wear appropriate eye protection and secure the workpiece before drilling. Match feed rate and spindle speed to the workpiece material to avoid overheating the cutting edge. For extended service life, avoid running the bit dry on hard materials — use cutting fluid where applicable.