Hertel 18001 Countersink 1/8 in 82 Degree 1 Flute Hss

Product Description

The HERTEL 18001 is a single-flute countersink designed for creating clean, conical seat profiles in metal and other materials. Built from high speed steel, it delivers reliable cutting performance across a range of substrate hardnesses. The 1/8 inch head diameter and 82-degree included angle make it well suited for flush-seating flat-head fasteners in light-duty and precision applications. The straight-cylindrical shank accepts standard drill chucks without adapters. Machinists, tool-and-die workers, and maintenance technicians install this type of countersink in hand drills, drill presses, and CNC machines where a compact, single-flute tool is preferred for reduced chatter and consistent seat geometry.

This countersink is appropriate for use in metalworking, sheet metal fabrication, and general maintenance applications where small-diameter countersinking is required. The 82-degree angle matches the standard seating angle for flat-head machine screws and bolts used in many aerospace and general industrial assemblies. Its compact 1/8 inch head and shank diameter make it suitable for tight-clearance work and small-part fixturing where larger countersinks would not fit.

Key Features

• 1/8 inch head diameter for compact, precision countersinking
• 82-degree included angle for flush-seating standard flat-head fasteners
• Single-flute geometry reduces chatter and produces smooth seat surfaces
• High speed steel construction provides hardness and heat resistance for metal cutting
• Straight-cylindrical shank fits standard drill chucks and collets without adapters

Compatibility

Designed as an OEM-style replacement or direct-use single-flute countersink for hand drills, benchtop drill presses, and CNC spindles accepting 1/8 inch straight-cylindrical shanks.

Installation Notes

This tool is installed and operated by machinists or maintenance technicians in standard drilling equipment. Secure the straight-cylindrical shank firmly in the chuck or collet before operation, and verify the spindle is fully stopped before changing or adjusting the tool. Use appropriate cutting fluid for the workpiece material to extend tool life and improve finish quality. Always wear proper eye protection when operating rotary cutting tools.