Hertel H-81185030500 Combo Drill Countersink Hss 5 in

Product Description

The HERTEL H-81185030500 is a combination drill and countersink tool designed to drill a pilot hole and form a countersink seat in a single operation. Built from high-speed steel with a bright uncoated finish, this tool features a 1/4 inch body diameter, a 7/64 inch drill point diameter, and a 118-degree drill point angle. The 60-degree included angle creates a standard countersink profile suited for flat-head fastener seating. At 5 inches overall length, this is a long-length configuration. It is installed by machinists, tool and die workers, and metalworking professionals using a drill press, CNC machine, or hand drill with appropriate chuck capacity.

This combo drill countersink is intended for metalworking and general fabrication applications where a pilot hole and countersink must be formed in one pass. The double end-type construction and plain cutting edge make it suited for work in steel, aluminum, and similar materials. It is a non-tapered, non-aircraft-style tool appropriate for standard shop and production environments. Trade size 3 corresponds to the 7/64 inch point diameter, making it compatible with common flat-head fastener sizing in both light manufacturing and maintenance applications.

Key Features

• Combination drill and countersink completes pilot hole and seat in one operation
• High-speed steel construction provides hardness and wear resistance in metal cutting
• 118-degree drill point angle suits general-purpose drilling in steel and aluminum
• 60-degree included angle matches standard flat-head screw countersink profiles
• Long-length design at 5 inches OAL extends reach for deeper workpiece access
• Double end-type configuration for extended tool life

Compatibility

Designed as a standard combination drill countersink for use in drill presses, lathes, CNC machining centers, and hand drills with a chuck capable of accepting a 1/4 inch shank diameter.

Installation Notes

This tool is installed by machinists and metalworking technicians. Secure the workpiece firmly before operation and use appropriate cutting fluid for ferrous materials to extend tool life and improve finish quality. Ensure the machine spindle is fully stopped before changing or inspecting the tool. Follow applicable shop safety procedures and machine manufacturer guidelines for RPM selection based on material and tool diameter.