Hertel 18677 Countersink 1 in 82 Degree 4 Flute Hss

Product Description

The HERTEL 18677 is a high-speed steel countersink designed for chamfering and deburring operations in metal fabrication, machining, and maintenance applications. It features a 1-inch head diameter and an 82-degree included angle, making it suited for seating flat-head fasteners to a flush finish. The 4-flute design provides a smooth cutting action and reduces chatter when working in steel, aluminum, and similar materials. The straight-cylindrical shank measures 0.5 inches in diameter, allowing it to seat securely in standard drill chucks and collet holders. This tool is used by machinists, maintenance technicians, and fabricators who need consistent countersink geometry across production or repair work.

This countersink is a standard choice for general-purpose metalworking where an 82-degree seat angle is required, which is the common angle for flat-head screws used in North American applications. It fits into typical drill press, CNC, or hand-drill setups and is well matched for production environments or job-shop use where repeatable chamfer depth and angle are priorities. The high-speed steel construction holds up under moderate-speed drilling conditions without requiring carbide tooling investment.

Key Features

• 1-inch head diameter provides a wide chamfer footprint for larger fastener seats
• 82-degree included angle matches the standard flat-head screw geometry used in most North American hardware
• 4-flute geometry reduces chatter and produces a cleaner finish compared to single-flute designs
• High-speed steel construction offers good wear resistance across a range of common metals
• 0.5-inch straight-cylindrical shank fits standard drill chucks and collet holders without adapters

Compatibility

Designed as an OEM-style replacement or direct-use countersink for standard metalworking setups requiring an 82-degree included angle and a 0.5-inch straight-cylindrical shank. No specific machine or system compatibility was stated in the product data.

Installation Notes

This countersink is installed by machinists and fabricators in drill presses, CNC machining centers, or hand drills using a standard chuck or collet. Secure the shank fully before operation and verify spindle speed is appropriate for the material being cut. Always power down and lock out the machine before changing tooling. Do not exceed the tool's rated operating conditions for the material being countersunk.