Hertel 18077 Countersink 3/8 in 82 Degree 6 Flute Hss

Product Description

The HERTEL 18077 is a 6-flute countersink designed for producing clean, accurate conical recesses in metal, wood, and composite materials. It features a 3/8-inch head diameter and an 82-degree included angle, making it suited for seating flat-head fasteners flush with or below a workpiece surface. The straight-cylindrical shank measures 1/4 inch in diameter and 1 inch in length, providing a secure grip in standard drill chucks and collet holders. Constructed from high-speed steel, it delivers the edge retention needed for general-purpose countersinking in production and maintenance environments.

This countersink is used in metal fabrication shops, maintenance facilities, and light manufacturing settings where consistent, burr-free countersinks are required. It is appropriate for hand-held electric drills, drill presses, and milling machines. The 6-flute geometry reduces chatter compared to single-flute designs, resulting in a smoother finish on ferrous and non-ferrous metals. Machinists, toolmakers, and general maintenance technicians are the typical users.

Key Features

• 3/8-inch head diameter sized for standard flat-head fastener applications
• 82-degree included angle matches common flat-head screw specifications
• 6-flute design minimizes chatter and produces a smoother recess finish
• High-speed steel construction provides edge retention across a range of workpiece materials
• 1/4-inch straight-cylindrical shank fits standard drill chucks and collet holders
• 1-inch shank length allows secure clamping with minimal runout

Compatibility

Designed as an OEM-style replacement or direct-use countersink for applications requiring an 82-degree, 6-flute tool with a 1/4-inch straight shank. Fits any drill press, hand drill, or milling machine equipped with a 1/4-inch or larger chuck or collet system.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician familiar with rotating cutting tools. Secure the shank fully in the chuck or collet before operation and confirm there is no excessive runout before engaging the workpiece. Always power down and de-energize the machine before changing or adjusting the tool. Use appropriate cutting fluid for ferrous metals to extend tool life and improve finish quality.