Hertel 334-003090 Carbide Countersink 0.25in 120 Deg 4 Flute

Product Description

The HERTEL 334-003090 is a solid carbide countersink designed for creating clean, chamfered entry holes in metalwork, woodworking, and composite material applications. With a 0.25 inch head diameter and a 120-degree included angle, this tool produces accurate countersunk seats for flat-head fasteners. The four-flute configuration improves chip evacuation and surface finish compared to single-flute designs. The straight cylindrical shank measures 0.25 inches in diameter, making it compatible with standard drill chucks and collet holders. This countersink is sized for precision work in light industrial, maintenance, and fabrication environments where consistent chamfer geometry is required.

This countersink is suited for use in machine shops, maintenance facilities, and fabrication operations where flat-head screw seating and deburring are routine tasks. The 120-degree included angle is a common specification for metric and unified fastener countersinking across steel, aluminum, and plastic substrates. The straight cylindrical shank allows direct chucking in standard drill presses, CNC machining centers, and handheld drill motors. It is installed and operated by machinists, maintenance technicians, and skilled tradespeople working with metal fabrication or structural assembly.

Key Features

• 0.25 inch head diameter for precise countersinking of small fastener seats
• 120-degree included angle suits common flat-head fastener standards
• Four-flute design promotes chip clearance and improved surface finish
• Solid carbide construction provides hardness and wear resistance for metalworking applications
• Straight cylindrical shank fits standard drill chucks and collet holders without adapters

Compatibility

Designed as an OEM-style replacement or direct-use countersink for applications requiring a 0.25 inch diameter, 120-degree, four-flute straight-shank carbide countersink tool.

Installation Notes

This tool is installed by machinists and fabrication technicians in drill presses, milling machines, or handheld power drills. Ensure the workpiece is securely clamped before operation and confirm the spindle speed is appropriate for the workpiece material and tool diameter. Inspect the shank and flutes for damage before each use. Follow applicable shop safety standards and wear appropriate eye protection when operating rotary cutting tools.