Hertel 66692344 Jobber Drill Bit 7/64 Inch Hss Tialn

Product Description

The HERTEL 66692344 is a high speed steel jobber-length drill bit designed for general-purpose holemaking in metal, wood, and composite materials. It measures 7/64 inch (0.1094 inch decimal) in diameter with an overall length of 2-5/8 inches and a flute length of 1-1/2 inches. The 135-degree split point reduces walking at the start of a hole without requiring a center punch, and the TiAlN coating increases surface hardness and heat resistance for extended tool life in demanding drilling applications. This is a heavy-duty grade bit suited for professional shop and field use.

The 66692344 is a standard jobber-series drill bit used across metalworking, HVAC fabrication, mechanical contracting, and general maintenance trades. Its straight cylindrical shank fits standard three-jaw drill chucks. The 7/64-inch size is a common choice for pilot holes, clearance holes for small fasteners, and sheet metal work. The right-hand spiral flute with regular helix efficiently clears chips during through-hole drilling. This bit carries the NAS specification designation, indicating it meets national aerospace standards for dimensional and performance consistency.

Key Features

• 135-degree split point starts on contact without center-punching and reduces thrust force
• TiAlN coating improves heat and wear resistance for extended run life in ferrous materials
• Web-thinned, tapered web construction lowers cutting resistance and improves chip evacuation
• Heavy-duty grade high speed steel provides toughness for intermittent and interrupted cuts
• Straight cylindrical shank fits standard keyless and keyed drill chucks
• Meets NAS specification for dimensional consistency

Compatibility

Designed as a standard jobber-length drill bit compatible with any drill press, hand drill, or mill with a chuck capable of holding a 0.1094-inch straight cylindrical shank.

Installation Notes

Install and remove drill bits only with the drill or press powered off and the chuck fully secured. Use appropriate cutting fluid or coolant when drilling ferrous metals to maximize coating life and prevent work hardening. Ensure the workpiece is clamped before drilling to prevent rotation. Inspect the cutting edges before each use and replace bits that show visible chipping or excessive wear to maintain hole quality and operator safety.