Hertel 18301 Countersink 1/4 in 100 Deg 6 Flute Hss

Product Description

The HERTEL 18301 is a straight-shank countersink designed for creating angled seat recesses in metal, plastic, and composite materials. Featuring a 100-degree included angle and six flutes, this tool produces clean, chatter-resistant countersinks suitable for flathead fastener seating and deburring applications. The 0.25 inch head diameter and matching 0.25 inch straight-cylindrical shank make it compatible with standard drill chucks and collet holders. Manufactured from high speed steel, it delivers reliable edge retention across a range of workpiece materials. This tool is well-suited for machine shop, maintenance, and fabrication environments where consistent countersink geometry is required.

The HERTEL 18301 is used in metalworking, fabrication, and general machining applications where precise countersink profiles are needed for flathead screws, rivets, or edge chamfering. Its six-flute geometry distributes cutting load evenly, making it appropriate for use in drill presses, CNC machining centers, and hand-held power drills with a stable setup. It fits residential and commercial maintenance applications as well as light production machining where a compact, 0.25 inch shank tool is the preferred form factor.

Key Features

• 100-degree included angle for standard flathead fastener seating
• Six flutes for reduced chatter and smoother finish
• 0.25 inch head diameter with matching 0.25 inch straight-cylindrical shank
• High speed steel construction for general-purpose cutting performance
• Straight-cylindrical shank fits standard drill chucks and ER collets

Compatibility

Designed as a general-purpose countersink for use with standard 0.25 inch straight-shank drill chucks, collet systems, and drill press quills in metalworking and fabrication applications.

Installation Notes

Install this countersink into a properly sized drill chuck or collet and ensure the shank is fully seated and securely clamped before operation. Secure the workpiece firmly to prevent movement during cutting. Use appropriate cutting fluid or lubricant when working with ferrous metals to extend tool life and improve finish quality. Inspect the cutting edges for wear before each use and discontinue use if chipping or dullness is observed.