Hertel 71206189 Jobber Drill Bit Wire 1 Hss Oxide

Product Description

The HERTEL 71206189 is a jobber-length twist drill bit sized to wire gauge No. 1, with a decimal diameter of 0.2280 inches. It is ground from high speed steel and finished with a black oxide coating for basic corrosion resistance and reduced friction during cutting. The 118-degree standard point angle makes it suitable for general-purpose drilling in a wide range of materials including mild steel, aluminum, brass, and plastics. With an overall length of 3.875 inches and a flute length of 2.625 inches, this bit fits standard drill chucks and drill presses used in metalworking, maintenance, and fabrication shops. Installation and use require no special tooling beyond a compatible drill driver or press.

This drill bit is designed for general-purpose drilling applications in both shop and field environments. It is commonly used by machinists, maintenance technicians, plumbers, electricians, and HVAC service professionals when drilling pilot holes, clearance holes, or tap-drill holes in sheet metal, structural steel, copper pipe, and light-gauge materials. The straight-cylindrical shank seats directly in standard three-jaw drill chucks without adapters, making it a straightforward addition to any trade toolkit.

Key Features

• Wire gauge No. 1 size — 0.2280 inch decimal diameter for precise hole sizing
• 118-degree standard point angle suitable for general-purpose drilling across common metals and plastics
• High speed steel construction provides heat resistance during sustained drilling operations
• Black oxide coating reduces friction and offers basic surface corrosion protection
• Web-thinned tapered web design improves chip evacuation and reduces thrust required at the point
• Spiral flute with regular helix promotes consistent chip clearing during through-hole drilling

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with any standard three-jaw drill chuck or drill press accepting a straight-cylindrical shank of 0.2280 inches.

Installation Notes

A licensed machinist or qualified tradesperson should secure the bit fully in the chuck before operation, ensuring no shank slippage under load. Always center-punch the workpiece before drilling to prevent walking on hard or smooth surfaces. Use appropriate cutting fluid or coolant when drilling ferrous metals to extend bit life and reduce heat buildup. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point is damaged.