Hertel 331-205060 Countersink 3/8 in Carbide 1 Flute

Product Description

The HERTEL 331-205060 is a single-flute carbide countersink designed for precision chamfering and deburring of holes in metal and hard materials. With a 3/8 inch head diameter and an 82-degree included angle, this tool produces clean, consistent countersunk seats for flat-head fasteners. The straight-cylindrical shank measures 3/8 inch in diameter, making it compatible with standard drill chucks and collet holders. The carbide construction provides superior hardness and wear resistance compared to high-speed steel, extending tool life when working with abrasive or hardened workpiece materials. Machinists, toolroom technicians, and metal fabricators are the primary users of this tool.

This countersink is suited for use in manual drill presses, CNC machining centers, and hand-held power tools where a 3/8 inch straight shank can be gripped securely. The 82-degree included angle is the standard angle specified for most imperial flat-head machine screws and is commonly required in aerospace, automotive, and general metalworking applications. The single-flute geometry reduces chatter and produces a smoother finish in the countersunk recess compared to multi-flute designs, making it a practical choice for finish-critical work.

Key Features

• Carbide construction for extended wear resistance in hard and abrasive materials
• 82-degree included angle matches standard imperial flat-head fastener geometry
• Single-flute design minimizes chatter and improves surface finish quality
• 3/8 inch straight-cylindrical shank fits standard drill chucks and collet holders
• 3/8 inch head diameter suitable for common fastener countersink sizes

Compatibility

Designed as an OEM-style replacement or direct-use countersink for applications requiring an 82-degree, single-flute carbide tool with a 3/8 inch straight-cylindrical shank.

Installation Notes

This tool is installed and operated by machinists or toolroom technicians in machine shop environments. Secure the straight shank firmly in a drill chuck or collet before use and verify runout is within acceptable tolerance to prevent premature tool wear. Always power down and de-energize the machine spindle before installing or removing the tool. Use appropriate cutting fluid or coolant for the workpiece material to maximize tool life and surface finish quality.