Hertel 18017 Countersink 3/8 in 90 Degree 1 Flute Hss

Product Description

The HERTEL 18017 is a single-flute countersink designed for creating chamfered seat profiles in metal and similar materials. With a 3/8-inch head diameter and a 90-degree included angle, it produces clean, consistent countersunk recesses for flat-head fasteners. The straight cylindrical shank measures 1/4 inch in diameter, providing positive retention in standard drill chucks and quick-change holders. Constructed from high speed steel (HSS), the tool maintains cutting edge integrity across a range of ferrous and non-ferrous workpiece materials. Machinists, tool-and-die technicians, and maintenance trades use this countersink in both bench-drill and handheld-drill applications.

The HERTEL 18017 suits production and maintenance work where flat-head screws must sit flush or slightly below the workpiece surface. The 90-degree included angle matches the most common flat-head fastener geometry used in North American manufacturing and assembly. The single-flute design allows the tool to run with minimal chatter on softer metals and plastics, and the compact 1/4-inch shank fits standard drill press and portable drill equipment without an adapter.

Key Features

• 3/8-inch head diameter sized for common flat-head fastener recesses
• 90-degree included angle matches standard flat-head screw geometry
• Single-flute construction reduces chatter on softer materials
• High speed steel body resists wear across ferrous and non-ferrous workpieces
• 1/4-inch straight cylindrical shank fits standard drill chucks and quick-change holders

Compatibility

Designed as an OEM-style replacement or direct-use countersink compatible with standard 1/4-inch drill chucks, drill presses, and quick-change tool holders used in general metalworking and maintenance applications.

Installation Notes

Installation and use of this countersink should be performed by qualified machinists or trade technicians familiar with rotating cutting tools. Secure the workpiece fully before operation, and confirm the shank is properly clamped in the chuck before starting the spindle. Use appropriate cutting fluid or lubricant when working with steel to extend tool life and improve surface finish. Always wear appropriate eye protection and follow shop safety protocols when operating drill equipment.