Hertel 19187 Countersink 7/8 in 120 Degree 1 Flute Hss

Product Description

The HERTEL 19187 is a single-flute countersink designed for creating clean, accurately angled seat profiles in metal and other hard materials. With a 7/8 inch head diameter and a 120-degree included angle, this tool produces the wide, shallow countersink geometry required for flathead fasteners and deburring operations. The straight cylindrical shank measures 1/2 inch in diameter, making it compatible with standard drill chucks and collet holders. Constructed from high speed steel, it offers the hardness and heat resistance needed for consistent performance in machining and fabrication environments. This countersink is well suited for machinists, tool and die workers, and maintenance professionals working with metal stock.

The HERTEL 19187 is used in drilling and metalworking operations where precise countersink geometry is required. The 120-degree angle is commonly specified for applications involving flat-head fasteners, spot facing, and chamfering of drilled holes. It is appropriate for use in manual drill presses, milling machines, and hand-held power drills equipped with a 1/2 inch chuck. This tool suits both production floor and job-shop environments where accuracy and repeatability in hole preparation are critical.

Key Features

• 7/8 inch head diameter for wide countersink coverage
• 120-degree included angle suits flathead fastener seating and chamfering
• Single-flute design reduces chatter and provides smooth cutting action
• 1/2 inch straight cylindrical shank fits standard chucks and collet holders
• High speed steel construction provides hardness and heat resistance for metal cutting

Compatibility

Designed as a direct-fit countersink for use in any drill press, milling machine, or power drill accepting a 1/2 inch straight cylindrical shank tool.

Installation Notes

This countersink is installed and operated by machinists and metalworking tradespeople using standard drill chucks or collet systems. Ensure the machine spindle is fully stopped and the tool is secured before beginning any cutting operation. Use appropriate cutting fluid or lubricant when countersinking steel or other ferrous materials to prolong tool life and improve finish quality. Verify workpiece clamping before operation to prevent movement during cutting.