Hertel 18019 Countersink 3/8 in 120 Degree 1 Flute Hss

Product Description

The HERTEL 18019 is a single-flute countersink designed for chamfering and deburring holes in metal, wood, and composite materials. Built from high speed steel, it delivers consistent cutting performance across repetitive operations without rapid edge breakdown. The 120-degree included angle suits standard fastener seating applications, and the 3/8-inch head diameter keeps the tool compact for close-tolerance work. The 1/4-inch straight cylindrical shank accepts standard drill chucks and quick-change holders. This tool is a common choice for machinists, fabricators, and maintenance technicians working at the drill press, milling machine, or with a handheld drill motor.

The HERTEL 18019 countersink is suited for production and maintenance environments where clean, consistent countersunk seats are required. The single-flute geometry reduces chatter and produces a smoother surface finish compared to multi-flute designs, making it well suited for softer metals and plastics where chatter is a concern. Typical applications include preparing holes for flat-head fasteners, chamfering burrs after drilling, and spot-finishing countersunk profiles in sheet metal or structural components.

Key Features

• 3/8-inch head diameter for compact access in tight work envelopes
• 120-degree included angle sized for standard flat-head fastener seating
• Single-flute design reduces chatter and improves finish on softer materials
• High speed steel construction provides durable cutting edge retention
• 1/4-inch straight cylindrical shank fits standard drill chucks and quick-change systems

Compatibility

Designed as a standard single-flute countersink for use in drill presses, milling machines, and handheld drills accepting a 1/4-inch straight cylindrical shank.

Installation Notes

Installation is performed by machinists, fabricators, or maintenance technicians familiar with rotating cutting tools. Secure the shank fully in the drill chuck or collet before operation, and verify the workpiece is clamped to prevent movement. Use appropriate cutting fluid for the base material to extend tool life and improve finish quality. Inspect the cutting edge for wear before each use and replace the tool if chipping or dullness is observed.