Hertel 4140109 Cobalt Tialn Jobber Drill Bit Wire 16

Product Description

The HERTEL 4140109 is a cobalt jobber-length drill bit with a TiAlN (titanium aluminum nitride) coating, designed for heavy-duty holemaking in demanding materials. It carries a wire gauge size of 16, which corresponds to a decimal diameter of 0.1770 inches. The 135-degree split point reduces walking on entry and lowers the thrust required to start the hole, making it well-suited for hard steels, stainless, and high-temperature alloys. The TiAlN coating adds surface hardness and thermal resistance, extending tool life in high-speed or dry-cutting applications. Licensed machinists, tool-and-die tradespeople, and maintenance mechanics are the primary users.

This bit is used in general metal fabrication shops, maintenance and repair operations, and production environments where wire-size drill accuracy is required. The straight-cylindrical shank fits standard three-jaw chucks on drill presses, CNC machining centers, and handheld power drills. Its regular spiral flute geometry and tapered web configuration support chip evacuation in through-hole applications across a range of ferrous and non-ferrous workpieces. The 0.1770-inch diameter falls within the 0.1500 to 0.2000 inch heavy-duty drill size range.

Key Features

• Wire size 16 (0.1770 inches) straight-cylindrical shank for standard chuck compatibility
• Cobalt construction provides heat resistance and hardness for cutting tough alloys and stainless steel
• TiAlN coating increases surface hardness and extends tool life in high-speed cutting
• 135-degree split point reduces entry walking and lowers required thrust
• Web-thinned, tapered web design improves chip clearance and cutting efficiency
• Right-hand, regular spiral flute geometry for standard holemaking operations

Compatibility

Designed as an OEM-style jobber drill bit suitable for use in standard three-jaw chucks and collet systems accepting a 0.1770-inch straight-cylindrical shank.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with rotating cutting tools. Secure the shank fully in the chuck and verify concentricity before operating. Always wear appropriate eye protection and secure the workpiece firmly before drilling. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed rates.