Hertel 334-308070 Carbide Countersink 3/4 in 90 Deg 4 Flute

Product Description

The HERTEL 334-308070 is a solid carbide countersink designed for producing clean, accurately angled seat profiles in metal and other hard materials. With a 90-degree included angle and a 0.75-inch head diameter, this tool generates the conical recess needed to seat flat-head fasteners flush with or below a workpiece surface. The straight-cylindrical shank measures 0.75 inches in diameter, allowing direct mounting in standard drill chucks or collet holders. Four flutes distribute cutting load evenly, reducing chatter and improving surface finish. Machinists, tool-and-die professionals, and maintenance mechanics reach for this style of countersink when consistent seat geometry and edge life on harder materials are required.

This countersink is suited for use in CNC machining centers, manual mills, and drill presses operating on ferrous metals, stainless steel, aluminum, and similar materials where carbide cutting geometry outperforms high-speed steel. It is appropriate for production runs and precision one-off work in job shops, aerospace maintenance, and general manufacturing environments. The 0.75-inch shank diameter makes it compatible with standard toolholding systems commonly found in those settings.

Key Features

• 90-degree included angle for standard flat-head fastener seating
• 0.75-inch head diameter provides ample contact area for clean countersink profiles
• Four flutes for balanced cutting action and reduced chatter
• Solid carbide construction for extended edge life in hard and abrasive materials
• Straight-cylindrical shank for direct chuck or collet mounting without adapters

Compatibility

Designed as an OEM-style replacement or direct-use countersink for machining applications requiring a 0.75-inch, 90-degree, 4-flute carbide tool with a straight-cylindrical shank. No specific compatible machine models were stated in the product data.

Installation Notes

Installation and use should be performed by a qualified machinist or tooling professional. Secure the straight shank firmly in a properly sized collet or drill chuck before operation, and verify runout is within acceptable limits for the application. Always power down and lock out the machine spindle before changing tooling. Follow applicable shop safety standards and the machine manufacturer guidelines for maximum RPM and feed rates appropriate to the workpiece material.