Hertel 74147570 Cobalt Reduced Shank Drill Bit 47/64 in

Product Description

The HERTEL 74147570 is a reduced shank cobalt drill bit designed for drilling into tough, high tensile strength materials where standard high-speed steel bits fail or wear prematurely. It features a 47/64 inch cutting diameter with a reduced 1/2 inch straight-cylindrical shank, allowing it to run in standard 1/2 inch drill chucks without requiring a larger chuck capacity. The 118-degree standard point angle suits general-purpose drilling across a wide range of ferrous and non-ferrous metals. An oxide straw finish provides baseline lubricity and surface protection. Overall length is 6 inches with a 3 inch flute length. Right-hand cut with a regular spiral flute geometry. Weight is 0.403 pounds.

This bit is suited for metalworking applications in manufacturing, maintenance, and fabrication environments where operators encounter harder alloy steels, stainless, and other high tensile strength materials. The reduced shank design makes it practical for use with standard 1/2 inch capacity drill presses, magnetic drills, and hand drills without a dedicated large-shank chuck. Typical users include machinists, maintenance technicians, pipefitters, and fabricators who need a larger cutting diameter without stepping up chuck size. The cobalt construction allows it to hold an edge under the elevated heat generated when drilling hard materials at standard feeds and speeds.

Key Features

• Cobalt construction retains hardness and edge integrity when drilling tough high tensile strength materials
• Reduced 1/2 inch straight-cylindrical shank fits standard 1/2 inch drill chucks despite the larger 47/64 inch cutting diameter
• 118-degree standard point angle for general-purpose metal drilling
• 3 inch flute length supports drilling depth up to 3 inches
• Oxide straw finish provides surface lubricity and corrosion resistance during storage
• Right-hand cut, regular spiral flute geometry for consistent chip evacuation

Compatibility

Designed for use in 1/2 inch capacity drill chucks on drill presses, magnetic base drills, and heavy-duty hand drills. Intended for cutting tough high tensile strength ferrous and non-ferrous materials. No coolant-through capability; use external cutting fluid as needed for the workpiece material.

Installation Notes

Secure the reduced shank firmly in a properly sized 1/2 inch chuck and verify runout before beginning the cut. Power down the drill completely before changing or inspecting the bit. Use appropriate cutting fluid for the workpiece material to reduce heat buildup and extend bit life. Eye protection and appropriate chip guarding are required during operation per standard shop safety practices.