Hertel 66691866 Cobalt Drill Bit Size 10 Wire Tin

Product Description

The HERTEL 66691866 is a cobalt screw machine length drill bit sized for wire gauge No. 10, with a decimal equivalent of 0.1935 inches. It features a 135-degree split point with web thinning for fast penetration and reduced walking on hard materials. The TiN (titanium nitride) coating extends tool life by increasing surface hardness and reducing friction. At 2.25 inches overall length, this short-series bit is designed for use in tight clearance applications where standard length bits cannot reach. It is used by machinists, pipefitters, sheet metal workers, and maintenance technicians drilling through ferrous and non-ferrous materials.

This drill bit is suited for production drilling in metal fabrication shops, maintenance and repair operations, and field service environments. The screw machine length geometry provides greater rigidity than jobber-length bits, making it appropriate for drilling stainless steel, alloy steel, cast iron, and high-strength metals where a standard HSS bit would wear prematurely. The straight cylindrical shank fits standard drill chucks on both handheld and machine-mounted drills.

Key Features

• Cobalt tool material with TiN coating for extended wear life in hard metals
• 135-degree split point with web thinning for self-centering and reduced thrust force
• Screw machine (stub) length for increased rigidity and use in restricted spaces
• Straight cylindrical shank compatible with standard drill chucks
• Right-hand cutting direction with regular spiral flute
• Heavy duty grade rated for demanding production and maintenance applications

Compatibility

Designed as an OEM-style replacement screw machine length drill bit for use in any standard drill chuck accepting a 0.1935-inch straight cylindrical shank.

Installation Notes

Installation is performed by machinists and maintenance technicians using standard drill presses, CNC drilling machines, or hand drills with a compatible chuck. Secure the shank fully in the chuck before operation to prevent slippage. Use appropriate cutting fluid when drilling hard alloys to preserve coating life. Inspect the cutting edge before each use and replace if chipping or dulling is evident to avoid workpiece damage.