Hertel 74147604 Cobalt Drill Bit 25/32 in 1/2 in Shank

Product Description

The HERTEL 74147604 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. The 25/32 inch cutting diameter pairs with a 1/2 inch straight-cylindrical shank, allowing it to fit standard 1/2 inch drill chucks even though the cutting diameter is larger. The 118-degree standard point angle suits general-purpose drilling across a wide range of metals. An oxide straw finish provides mild corrosion resistance and reduces friction during cutting. This bit is suited for machinists, maintenance technicians, and fabricators working on production or job-site drilling applications.

This drill bit is built for right-hand cutting operations in tough high tensile strength materials, including alloy steels, stainless, and similarly demanding metals. The reduced shank design extends compatibility to machines and drill presses equipped with 1/2 inch chucks, making a larger cutting diameter accessible without requiring a larger spindle. The 3 inch flute length supports a maximum drilling depth of 3 inches, and the 6 inch overall length provides clearance for use in a drill press or CNC setup. Typical users include machine shops, industrial maintenance crews, and metal fabrication professionals.

Key Features

• Cobalt construction for extended tool life in tough high tensile strength and abrasion-resistant metals
• Reduced 1/2 inch straight-cylindrical shank fits standard 1/2 inch chucks despite 25/32 inch cutting diameter
• 118-degree standard point angle for general-purpose metal drilling
• Right-hand spiral flute with regular helix for efficient chip evacuation
• Oxide straw finish reduces friction and provides mild corrosion resistance
• 3 inch flute length supports drilling depths up to 3 inches

Compatibility

Designed for use in drill presses, CNC drilling machines, and hand drills fitted with a 1/2 inch chuck. Intended for drilling tough high tensile strength materials. No specific machine model compatibility was provided by the manufacturer for this part number.

Installation Notes

Installation and use should be performed by qualified machinists or trained maintenance technicians familiar with metalworking drill bit safety. Secure the workpiece firmly before drilling and ensure the shank is fully seated and clamped in the chuck. Use appropriate cutting fluid or coolant if your machine and application call for it, as this bit is rated without coolant but fluid can extend tool life in demanding applications. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point is damaged.