Hertel 331-202070 Countersink 3/16 in 90 Degree 1 Flute Carbide

Product Description

The HERTEL 331-202070 is a single-flute carbide countersink designed for producing clean, accurate countersunk holes in metal, composite, and hard materials. With a 3/16 inch head diameter and a 90-degree included angle, this tool is suited for deburring, chamfering, and seat preparation on smaller-diameter fastener holes. The straight cylindrical shank measures 3/16 inch, allowing it to seat securely in standard collets and drill chucks. Carbide construction provides hardness and wear resistance well beyond high-speed steel alternatives, making it appropriate for production environments and precision fitting work where consistent geometry is required.

This countersink is used in light machining, fabrication, and assembly applications where a 90-degree countersunk seat is needed for flat-head fasteners or where edge chamfering is required on drilled holes. Its compact head diameter makes it particularly effective on close-tolerance work and confined hole patterns. Machinists, tool-and-die technicians, and precision fabricators are the primary users of this tool in both manual and CNC-assisted setups.

Key Features

• 3/16 inch head diameter for small-fastener countersinking and precision chamfering
• 90-degree included angle matches standard flat-head fastener geometry
• Single-flute design promotes clean chip evacuation and reduces chatter
• Carbide construction delivers superior hardness and extended tool life
• 3/16 inch straight cylindrical shank fits standard collets and drill chucks

Compatibility

Designed as a standard single-flute carbide countersink compatible with manual drill presses, milling machines, and CNC spindles accepting a 3/16 inch straight cylindrical shank.

Installation Notes

This tool is installed by machinists and fabricators in any spindle or collet system rated for a 3/16 inch straight shank. Ensure the spindle is fully stopped and de-energized before tool changes. Secure the shank with adequate collet or chuck engagement to prevent runout. Use appropriate speeds and feeds for carbide tooling in the workpiece material to avoid chipping the cutting edge.