Hertel 331-001060 Countersink 1/8 in 82 Degree Single Flute

Product Description

The HERTEL 331-001060 is a single-flute countersink designed for precision deburring and seat preparation in metalworking and fabrication applications. Built from alloy steel with a bright uncoated finish, this tool features a 1/8 inch head diameter and an 82-degree included angle, which is the standard angle for flat-head fastener seating in alloy steel and cast iron work. The straight cylindrical shank measures 1/8 inch in diameter for secure chuck engagement. Right-hand cutting geometry delivers clean, chatter-resistant entry on through-holes and blind seats. With a single flute design, it is well suited for manual and low-speed machine operations where controlled material removal is required.

This countersink is intended for use in machine shops, tool rooms, and maintenance environments where technicians need to prep fastener seats in alloy steel, cast iron, and glass-reinforced plastic workpieces. The 82-degree angle matches standard flat-head machine screw geometry, making it a practical choice for general countersinking tasks on both production and repair work. It is sold as a single unit and does not include a pilot.

Key Features

• 1/8 inch head diameter with 82-degree included angle for standard flat-head fastener seats
• Single-flute design for controlled cutting and reduced chatter at lower speeds
• Alloy steel construction with bright uncoated finish for general-purpose use
• Right-hand cut geometry compatible with standard drill press and hand drill operation
• 1/8 inch straight cylindrical shank fits standard collets and drill chucks
• No pilot included; suitable for use on pre-drilled holes

Compatibility

Designed for countersinking operations in alloy steel, cast iron, and glass-reinforced plastic. Compatible with any machine or hand tool accepting a 1/8 inch straight cylindrical shank. Not rated for hardened steel or abrasive composite materials beyond those specified.

Installation Notes

This tool is installed and operated by machinists, toolroom technicians, or maintenance mechanics using standard drill presses, CNC machines, or hand drills with appropriate chuck capacity. Secure the shank fully in the chuck or collet before operation and verify spindle speed is appropriate for the workpiece material and tool diameter. Inspect the cutting edge before use and replace if chipping or wear is evident. Do not exceed the tool's rated material applications.