Hertel 74147588 Cobalt Drill Bit 3/4 in 1/2 in Shank

Product Description

The HERTEL 74147588 is a reduced shank cobalt drill bit designed for drilling into tough, high tensile strength materials where standard high-speed steel bits fall short. Built from cobalt tool steel with a 118-degree standard point angle, this bit delivers the heat resistance and edge retention needed for demanding production and maintenance drilling. The 3/4-inch cutting diameter pairs with a 1/2-inch straight-cylindrical shank, allowing use in standard drill chucks and spindles that would not otherwise accept a full 3/4-inch shank. An oxide straw finish provides additional surface hardness and corrosion resistance. This bit is suited for machinists, maintenance technicians, and metalworking professionals working on the shop floor or in the field.

This drill bit is intended for use on tough, high tensile strength ferrous and non-ferrous workpiece materials including alloy steels, stainless steel, and similar hard metals. The reduced shank design makes it compatible with 1/2-inch capacity drill presses, magnetic drills, and hand-held drilling equipment. Right-hand cutting direction is standard for conventional CW-rotating spindles. The 3-inch flute length and 6-inch overall length suit through-hole and deeper drilling applications in plate, structural, and fabricated components.

Key Features

• Cobalt tool steel construction for superior heat and wear resistance in hard metals
• 118-degree standard point angle for self-centering starts on flat and curved surfaces
• Reduced 1/2-inch shank diameter allows use in standard 1/2-inch chuck equipment
• Oxide straw finish improves surface hardness and reduces friction during cutting
• Right-hand spiral flute with regular helix for efficient chip evacuation
• No coolant required per manufacturer specification, suitable for dry drilling operations

Compatibility

Designed as a reduced shank metalworking drill bit for use in 1/2-inch capacity drill chucks on drill presses, magnetic base drills, and handheld power drills. Rated for tough high tensile strength materials as specified by the manufacturer.

Installation Notes

This bit is installed and serviced by machinists or maintenance mechanics familiar with drilling equipment. Secure the 1/2-inch shank firmly in the chuck and verify runout before starting. Always use appropriate work-holding to prevent workpiece movement during drilling. Follow your equipment manufacturer's recommended RPM range for the workpiece material and bit diameter before beginning any operation.