Hertel 71206023 Jobber Drill Bit Letter K Hss Oxide

Product Description

The HERTEL 71206023 is a jobber-length twist drill bit sized to Letter K (0.2810 inches) and designed for general-purpose drilling in metal, wood, and plastic. Built from high speed steel with an oxide coating, it handles moderate-heat applications where carbide tooling is unnecessary. The 118-degree standard point angle suits flat and curved work surfaces. At 4.25 inches overall length with a 2.9375-inch flute length, it fits standard drill chucks and benchtop drill presses without extension. Right-hand spiral flutes clear chips efficiently during through-hole and blind-hole operations. This bit is sold individually and is a practical stock item for machine shops, maintenance trades, and fabrication work.

This bit is suited to production drilling and field maintenance where a Letter K clearance or pilot hole is called for. The straight-cylindrical shank at 0.2810 inches diameter seats directly in standard 3-jaw chucks and quick-change keyless chucks without adapters. The regular spiral and tapered-web configuration with web thinning reduce entry force and improve chip flow at the cutting edge. It is appropriate for use in drill presses, hand drills, and CNC drilling cycles in general-purpose applications. Machinists, millwrights, pipefitters, and maintenance technicians commonly stock this size for hardware clearance holes and fastener pilot work.

Key Features

• Letter K size — 0.2810 inches decimal equivalent
• 118-degree standard point angle with web-thinned, tapered web for reduced thrust
• High speed steel construction with oxide finish for heat and wear resistance
• Right-hand, 2-flute regular spiral for efficient chip evacuation
• Straight-cylindrical shank fits standard 3-jaw and keyless chucks without adapters
• General-purpose grade — suitable for metal, wood, and plastic substrates

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard drill press, hand drill, or CNC spindle accepting a straight-cylindrical shank up to 0.2810 inches in diameter.

Installation Notes

Secure the shank fully in the chuck before operation and confirm the chuck key is removed before starting the spindle. Use appropriate cutting fluid or lubricant when drilling ferrous metals to extend tool life and maintain hole tolerance. Wear eye protection and secure workpieces in a vise or fixture — never hand-hold parts during drilling. Inspect the cutting edge before each use; a chipped or dull point increases heat and can cause bit breakage.