Hertel 84581313 Jobber Drill Bit No 57 Hss 135 Deg

Product Description

The HERTEL 84581313 is a No. 57 wire-size jobber-length drill bit designed for precision holemaking in metal, plastic, and general-purpose materials. It is manufactured from high speed steel with an oxide finish that provides mild corrosion resistance and reduces friction during cutting. The 135-degree split point self-centers on entry, reducing the need for a center punch and minimizing walking on smooth surfaces. The bit measures 1.75 inches in overall length with a 0.75-inch flute length and a 0.0430-inch decimal diameter. The right-hand spiral flute evacuates chips efficiently during drilling operations. This bit is suited for use with hand drills, drill presses, and CNC equipment in trade and production environments.

This drill bit is intended for holemaking applications where a small-diameter, jobber-length tool is required. The No. 57 wire gauge size at 0.0430 inches suits fine pilot holes, tapping preparation, and close-tolerance work in sheet metal, light steel, aluminum, and thermoplastics. It is commonly used by HVAC technicians, electricians, plumbers, and general metalworkers who need consistent small-diameter holes in fabrication or field service work. The straight-cylindrical shank fits standard drill chucks without adapters.

Key Features

• No. 57 wire size, 0.0430 inch decimal diameter for fine pilot and tap-prep holes
• 135-degree split point self-centers and reduces walking on entry
• High speed steel construction with oxide coating for reduced friction
• Two-flute regular spiral design for efficient chip evacuation
• Web-thinned, tapered web for lower thrust requirements during drilling
• NAS specification designation, heavy-duty grade construction

Compatibility

Designed as a jobber-length replacement drill bit for standard drill chucks accepting a 0.0430-inch straight-cylindrical shank, suitable for hand drills, drill presses, and CNC spindles rated for small-diameter tooling.

Installation Notes

This bit is installed and removed by a licensed or trained technician using a standard keyed or keyless drill chuck. Ensure the drilling machine is powered down and the chuck is fully secured before beginning work. Use appropriate cutting fluid or lubricant when drilling ferrous metals to extend tool life. Wear eye protection and secure the workpiece to prevent movement during drilling.