Hertel 85707347 Jobber Drill Bit Wire 12 0.189 Hss Tin

Product Description

The HERTEL 85707347 is a jobber-length drill bit sized to wire gauge 12, with a decimal diameter of 0.1890 inches. Built from high-speed steel with a titanium nitride (TiN) coating, it is designed for general-purpose drilling in metal, wood, and plastics. The TiN coating reduces friction and extends cutting life compared to uncoated HSS. At 3.5 inches overall length with a 2-5/16-inch flute length, this is a standard jobber geometry suited to drill presses, hand drills, and CNC equipment. The 118-degree standard point angle and web-thinned tip reduce walking at entry. Machinists, maintenance techs, and general fabricators are the primary users.

This bit is used in light to medium production drilling, maintenance and repair operations, and general fabrication environments. Its straight-cylindrical shank fits standard drill chucks without an adapter, making it a drop-in choice for most drill presses and portable drills. The 0.1890-inch diameter falls within the 0.1500 to 0.2000-inch drill bit size range, covering common wire-gauge hole requirements in sheet metal, structural steel, aluminum, and thermoplastics.

Key Features

• TiN coating for reduced friction and extended tool life versus bare HSS
• 118-degree standard point angle with web-thinned, tapered-web tip for clean entry
• 2-flute regular spiral flute design for efficient chip evacuation
• Straight-cylindrical shank fits standard 3-jaw drill chucks directly
• Right-hand cut for use with conventional clockwise-rotating spindles
• General-purpose grade suitable for metals, wood, and plastics

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard drill press, hand drill, or CNC spindle equipped with a chuck that accepts a 0.1890-inch straight-cylindrical shank.

Installation Notes

Installation and use should be performed by machinists or qualified tradespeople following standard drilling safety practices. Secure the workpiece firmly before drilling and ensure the chuck is tightened fully on the shank. De-energize or power down the machine before inserting or removing the bit. Use appropriate cutting fluid when drilling ferrous metals to preserve coating life and manage heat buildup.