Hertel 18678 Countersink 1 in 82 Degree 4 Flute Hss

Product Description

The HERTEL 18678 is a single-piece high speed steel countersink designed for producing clean, chamfered entry holes in metal workpieces. With a 1-inch head diameter, an 82-degree included angle, and 4 flutes, this tool delivers smooth cutting action and accurate seat geometry on ferrous and non-ferrous materials. The straight-cylindrical shank measures 0.5 inches in diameter, making it compatible with standard drill chucks and collet holders. It is used in machine shop, manufacturing, and maintenance environments where consistent countersink depth and surface finish are required.

This countersink is suited for drilling and metalworking applications where flathead fastener seating, deburring, or chamfering operations are performed on steel, aluminum, and similar materials. The 82-degree included angle matches the standard geometry for flathead machine screws commonly used in aerospace and general metalworking applications. It is appropriate for use in drill presses, CNC machining centers, and manual milling setups. Machinists, toolroom technicians, and maintenance mechanics are the typical users of this tool.

Key Features

• 1-inch head diameter provides coverage for a wide range of fastener hole sizes
• 82-degree included angle matches standard flathead machine screw geometry
• 4-flute design promotes smooth cutting and reduced chatter
• High speed steel construction offers durability across ferrous and non-ferrous materials
• Straight-cylindrical shank fits standard drill chucks and collet holders without adapters

Compatibility

Designed as an OEM-style single-body countersink for use in drill presses, CNC machining centers, and manual drilling setups that accept a 0.5-inch straight-cylindrical shank tooling.

Installation Notes

This tool is installed by machinists and toolroom technicians using standard drill chucks or collet-style tool holders. Secure the shank fully in the holder before operation and verify runout before cutting. Use appropriate cutting fluid for the workpiece material to extend tool life. Power down the spindle completely before changing or inspecting the tool.