Hertel 18268 Countersink 3/8 in 60 Degree 1 Flute Hss

Product Description

The HERTEL 18268 is a single-flute countersink designed for creating conical recesses in metal, wood, and composite materials. Built from high speed steel (HSS), it delivers consistent cutting performance across a range of workpiece materials. The 60-degree included angle suits metric fastener seating and general countersinking applications where a shallower cone profile is required. The 3/8-inch head diameter and 3/8-inch straight cylindrical shank make it compatible with standard drill chucks and collet holders. Machinists, tool and die technicians, and fabricators typically reach for this tool when prepping holes for flush-mounted fasteners or deburring drilled bores.

This countersink fits standard machining and fabrication workflows in job shops, maintenance facilities, and production environments. The straight cylindrical shank seats directly into drill press chucks, CNC toolholders, or hand-drill chucks sized for 3/8-inch shanks. The single-flute design minimizes chatter on manual machines and is well suited for precise, controlled hand-fed operations. It is appropriate for use on ferrous and non-ferrous metals as well as plastics where a clean, burr-free countersink entry is needed.

Key Features

• 3/8-inch head diameter for compact countersink footprint
• 60-degree included angle for metric fastener seating and general-purpose countersinking
• Single-flute geometry reduces chatter and improves control on manual equipment
• High speed steel construction provides durability across common workpiece materials
• Straight cylindrical shank fits standard 3/8-inch drill chucks and collet holders

Compatibility

Designed as a general-purpose countersink for use in drill presses, hand drills, and CNC machines equipped with a 3/8-inch straight-shank toolholder or chuck.

Installation Notes

Secure the shank firmly in the chuck or collet before use and verify runout before engaging the workpiece. Power down the machine and remove the tool from the spindle before measuring or adjusting workpiece position. Use appropriate cutting fluid when countersinking hardened or stainless steel to extend tool life. Follow applicable shop safety standards and wear eye protection during all drilling and countersinking operations.