Hertel 71205918 Jobber Drill Bit 1/2 Inch Hss

Product Description

The HERTEL 71205918 is a 1/2 inch diameter high speed steel jobber drill bit designed for general purpose drilling in metal, wood, and plastic. It features a 118 degree standard point angle and an oxide coating that reduces friction and provides basic corrosion resistance during service. The overall length is 6 inches with a 4.5 inch flute length, giving it the extended reach typical of jobber-length bits. A web-thinned, tapered web construction reduces cutting resistance at the point and improves chip evacuation. This bit is suited for machinists, maintenance technicians, and trade professionals who need a reliable general purpose twist drill for production or field work.

This jobber drill is intended for general purpose drilling applications in fabrication shops, maintenance environments, and on-site trade work. The 1/2 inch straight cylindrical shank fits standard drill chucks without adapters. Right-hand spiral flutes clear chips efficiently during through-hole and blind-hole drilling. The 118 degree point angle is a conventional geometry suited for a wide range of materials including mild steel, aluminum, and thermoplastics. Maximum recommended drilling depth is 1 inch for optimal chip clearing and bit performance.

Key Features

• 1/2 inch diameter high speed steel construction for durability in metal drilling
• 118 degree standard point angle with web-thinned tapered web for reduced thrust
• Oxide coating reduces friction and provides basic rust resistance
• 4.5 inch flute length with regular right-hand spiral for efficient chip evacuation
• Straight cylindrical shank fits standard 1/2 inch drill chucks directly
• General purpose grade suitable for mild steel, aluminum, wood, and plastics

Compatibility

Designed as a general purpose jobber-length drill bit compatible with any drill press, hand drill, or CNC spindle equipped with a 1/2 inch or larger keyed or keyless chuck.

Installation Notes

Installation and use should follow standard machine shop or maintenance drilling practices. Secure the workpiece firmly before drilling and ensure the chuck is fully tightened on the shank before operation. Use appropriate cutting fluid when drilling ferrous metals to extend bit life and improve hole quality. Inspect the cutting edges before each use and replace the bit if the point shows chipping or excessive wear.