Precision Twist Drill 5998869 Jobber Drill Bit Letter K

Product Description

The PRECISION TWIST DRILL 5998869 is a jobber-length drill bit sized to letter K, equivalent to 9/32 inch (0.2810 inch decimal). It is manufactured from high speed steel with a bright, uncoated finish and features a standard 118-degree point angle. The spiral flute design and web-thinned, tapered web construction promote chip evacuation and reduce thrust during drilling. With an overall length of 4.25 inches and a 2-15/16-inch flute length, this bit fits standard drill chucks and is used by machinists, maintenance technicians, and metalworking tradespeople for general-purpose hole-making in production and job-site environments.

This drill bit is suited for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. Its straight-cylindrical shank with a diameter of 0.2810 inch seats securely in keyed or keyless chucks. The right-hand cut and regular spiral type make it appropriate for standard vertical or horizontal drilling operations in both manual and CNC drill press setups. It is a single-unit general-purpose tool intended for frequent use across a wide range of workpiece materials.

Key Features

• Letter K size: 9/32 inch (0.2810 inch decimal) drill diameter
• 118-degree standard point angle with web-thinned, tapered web for reduced thrust
• High speed steel construction for durability across ferrous and non-ferrous materials
• Bright uncoated finish compatible with cutting fluids and dry drilling
• 2-flute regular spiral design promotes efficient chip removal
• Straight-cylindrical shank fits standard drill chucks without adapters
• ANSI specification compliance for consistent dimensional accuracy

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any keyed or keyless chuck that accepts a 9/32-inch straight-cylindrical shank. Part of the R10P-R15P-R18P series.

Installation Notes

This bit is installed and operated by machinists, maintenance technicians, and metalworking professionals using standard drill presses, hand drills, or CNC equipment. Power down and de-energize all equipment before changing bits. Secure the shank fully in the chuck and verify runout before drilling. Coolant-through is not supported on this bit; apply cutting fluid to the workpiece surface when drilling harder materials to extend tool life.