Hertel 66694068 No. 7 Jobber Drill Bit 135 Deg Tin Hss

Product Description

The HERTEL 66694068 is a high speed steel jobber-length drill bit sized to No. 7 wire gauge (0.2010 inch decimal equivalent). It features a 135-degree split point that reduces walking on entry and lowers thrust requirements compared to a standard 118-degree tip. The TiN (titanium nitride) coating increases surface hardness and extends tool life in production drilling applications. Two spiral flutes with a regular helix evacuate chips efficiently and help maintain consistent hole quality through the cut. This bit is built to NAS specification and rated as heavy duty grade, making it appropriate for repeat-cycle use in shop and field environments.

This drill bit is suited for holemaking in metal, general fabrication, and maintenance applications where a wire-gauge size hole is required. The straight-cylindrical shank fits standard 3-jaw keyless and keyed drill chucks without an adapter. The 3-5/8-inch overall length and 2-7/16-inch flute length make it compatible with standard drill presses, hand drills, and mill setups. It is commonly used by machinists, pipefitters, electricians, and general maintenance technicians who need a reliable wire-size bit for close-tolerance work.

Key Features

• No. 7 wire gauge size - 0.2010 inch decimal diameter
• 135-degree split point reduces walk and cutting force on entry
• TiN coating for increased surface hardness and extended tool life
• High speed steel construction rated heavy duty grade to NAS specification
• Web-thinned tapered web for reduced thrust and improved chip clearance
• Straight-cylindrical shank fits standard drill chucks without an adapter

Compatibility

Designed as a jobber-length drill bit with a straight-cylindrical shank, compatible with any standard 3-jaw drill chuck that accepts a 0.2010-inch shank diameter.

Installation Notes

This bit is installed and removed by a licensed machinist, electrician, pipefitter, or qualified maintenance technician using a standard keyed or keyless drill chuck. Ensure the drill, press, or mill is powered down and de-energized before changing tooling. Secure the shank fully in the chuck and confirm concentricity before beginning the cut. Use appropriate cutting fluid for the workpiece material to maximize tool life and hole quality.