Hertel 334-305100 Carbide Countersink 3/8 in 4 Flute

Product Description

The HERTEL 334-305100 is a solid carbide countersink designed for chamfering and deburring operations in metal, wood, and composite materials. With a 120-degree included angle and four flutes, it produces clean, chatter-free seats for flat-head fasteners and edge breaks in a single pass. The 3/8-inch head diameter and matching 3/8-inch straight cylindrical shank make it compatible with standard drill chucks and collet holders. Carbide construction delivers extended tool life compared to high-speed steel, particularly in harder workpiece materials. Machinists, tool and die technicians, and maintenance professionals rely on this style of countersink for consistent, repeatable results across production and repair work.

This countersink suits CNC machining centers, manual drill presses, and hand-held drill motors where a controlled chamfer or fastener seat is required. The 120-degree included angle matches common flat-head machine screw standards, making it a frequent choice for sheet metal fabrication, fixture building, and general metalworking applications. Its compact 3/8-inch head diameter allows access in tighter part geometries where larger countersinks cannot be positioned effectively.

Key Features

• 120-degree included angle matches standard flat-head fastener seat geometry
• Four flutes for smooth cutting action and reduced chatter
• Solid carbide construction for extended tool life in ferrous and non-ferrous materials
• 3/8-inch straight cylindrical shank fits standard drill chucks and collet holders
• 3/8-inch head diameter for use in tighter part geometries

Compatibility

Designed as an OEM-style replacement or direct substitute countersink for use in standard 3/8-inch drill chucks and collet-style toolholders on drill presses, CNC machining centers, and hand-held drilling equipment.

Installation Notes

Installation and operation should be performed by qualified machinists or tooling technicians familiar with rotating cutting tools. Secure the straight shank fully within the chuck or collet before operation, and verify runout is within acceptable limits to prevent premature edge wear. Always follow machine guarding and PPE requirements per applicable shop safety standards. Inspect carbide cutting edges for chipping or wear before each use, as damaged carbide can fracture unpredictably under load.