Precision Twist Drill 5998255 Jobber Drill Bit 23/64 in

Product Description

The PRECISION TWIST DRILL 5998255 is a jobber-length drill bit designed for general-purpose drilling in metal and hard materials. Built from high-speed steel (HSS) with a bright uncoated finish, it features a standard 118-degree point angle and a two-flute right-hand spiral configuration. The bit measures 4.875 inches in overall length with a 3.5-inch flute length and a straight-cylindrical shank diameter of 0.3594 inches (23/64 inch). Web-thinned construction reduces thrust during entry. This bit is sized for use with standard drill chucks and is handled by machinists, maintenance technicians, and trade professionals working with ferrous and non-ferrous metals.

This drill bit is suited for production and maintenance drilling applications in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. It performs well in hand-held drill applications, drill presses, and CNC setups where a general-purpose jobber-length bit is appropriate. The 10xD flute-to-diameter ratio provides adequate chip clearance during through-hole and moderate-depth drilling operations. It ships individually and is sold in a minimum quantity of one.

Key Features

• High-speed steel construction for durability across a broad range of workpiece materials
• 118-degree standard point angle for general-purpose entry into steel and cast iron
• Bright uncoated finish — compatible with cutting fluids and coolant-assisted drilling
• Web-thinned, tapered-web design reduces drilling thrust and improves chip evacuation
• Right-hand, regular-spiral two-flute geometry for consistent chip clearing
• Straight-cylindrical shank fits standard drill chucks without adapters
• Meets ANSI standards for jobber-length drill bit geometry and tolerances

Compatibility

Part of the PRECISION TWIST DRILL Series R10P-R15P-R18P. Designed for use with standard drill chucks accepting a 23/64-inch straight-cylindrical shank. Suitable for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium in general-purpose drilling applications.

Installation Notes

Installed by machinists, maintenance technicians, and trade professionals using standard drill presses, hand drills, or CNC spindles. Secure the shank fully in the chuck and verify concentricity before operation. Apply appropriate cutting fluid for the workpiece material to extend tool life, particularly when drilling stainless steel or titanium. Do not exceed the maximum drilling depth of 3.5 inches without withdrawing the bit to clear chips.