Hertel 84580588 Jobber Drill Bit Letter K 0.281 in Hss

Product Description

The HERTEL 84580588 is a high speed steel jobber-length drill bit sized to Letter K, equivalent to 0.2810 inches in diameter. It features a 135-degree split point with web thinning for faster penetration and reduced walking on entry. The oxide coating provides light corrosion resistance and helps reduce friction during cutting. At 4.25 inches overall length with a 2.9375-inch flute, this bit fits standard drill chucks via its straight cylindrical shank. It is built to NAS specification standards and rated heavy duty, making it appropriate for metalworking, fabrication, and general holemaking tasks performed by machinists, pipefitters, ironworkers, and general contractors.

This jobber drill is suited for holemaking in metal and similar materials in both shop and field settings. The regular spiral flute with right-hand cutting direction handles typical through-hole and blind-hole applications. The tapered web configuration supports chip clearance during deeper cuts. It is sold individually and fits any trade application requiring a Letter K diameter hole, including bolt clearance drilling, tapping prep, and reaming prep work.

Key Features

• Letter K size, 0.2810 inches diameter, covers the 0.2500 to 0.3000 inch size range
• 135-degree split point with web thinning reduces thrust and minimizes bit walking
• High speed steel construction with oxide finish for durability and friction reduction
• Right-hand, regular spiral flute design for efficient chip evacuation
• Straight cylindrical shank fits standard drill chucks without adapters
• Built to NAS specification, heavy duty grade

Compatibility

Designed as a standard jobber-length drill bit for use in any drill press, hand drill, or CNC machine equipped with a chuck compatible with a 0.2810-inch straight cylindrical shank.

Installation Notes

Installation and use should be performed by a qualified machinist or tradesperson familiar with holemaking operations. Ensure the workpiece is securely clamped and the drill chuck is properly tightened before operation. Use appropriate cutting fluid or coolant for the material being drilled to extend bit life. Inspect the cutting edges before each use and replace the bit if chipping or wear is observed.