Hertel 18126 Countersink 2 in 90 Degree 6 Flute Hss

Product Description

The HERTEL 18126 is a high speed steel countersink designed for producing clean, accurate 90-degree countersunk holes in metal and other hard materials. With a 2-inch head diameter and 6 flutes, this tool delivers smooth cutting action and reduced chatter compared to single- or three-flute designs. The straight-cylindrical shank measures 1 inch in diameter and 2.125 inches in length, making it compatible with standard drill press chucks and milling machine collets. It is built for machinists, tool and die technicians, and metalworking professionals who require consistent, repeatable countersink geometry in production or maintenance environments.

This countersink is suited for deburring, chamfering, and seat preparation on drilled holes in ferrous and non-ferrous metals. The 6-flute configuration distributes cutting load evenly, which is particularly useful when working with harder steels or when surface finish quality is critical. It is commonly used in machine shops, fabrication facilities, and maintenance departments where precision fastener seat preparation is a routine operation.

Key Features

• 2-inch head diameter for large-diameter countersink applications
• 90-degree included angle — standard for flat-head fastener seating
• 6 flutes for smooth cutting and reduced chatter
• High speed steel construction for durability across ferrous and non-ferrous materials
• 1-inch straight-cylindrical shank fits standard drill press and milling machine toolholders
• Shank length of 2.125 inches provides adequate grip depth in most chucks and collets

Compatibility

Designed for use in standard drill press chucks, milling machine collets, and toolholders accepting a 1-inch straight-cylindrical shank.

Installation Notes

This tool is installed by machinists and metalworking technicians using standard chuck or collet toolholding equipment. Ensure the machine spindle is fully stopped and locked out before mounting or removing the countersink. Secure the shank to the full recommended grip depth in the chuck or collet to prevent slippage under load. Use appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish.