Hertel S-74148339 Combo Drill Countersink No. 6 Hss

Product Description

The HERTEL S-74148339 is a combination drill and countersink designed to drill a pilot hole and form a countersink in a single pass. Machined from high-speed steel with a bright, uncoated finish, this tool is suited for general-purpose metalworking, woodworking, and fabrication applications. It features a No. 6 trade size with a 1/2 inch body diameter, a 7/32 inch drill point diameter, a 60-degree included angle, and a 3 inch overall length. The double-end design extends tool life by providing two usable cutting ends. Right-hand cutting direction is standard for conventional drill press and hand-drill operation.

This combo drill countersink is used in machine shops, metal fabrication shops, and general manufacturing environments where countersunk fastener seats need to be formed quickly and accurately. It is appropriate for use on ferrous metals, aluminum, plastics, and wood. The plain cutting edge style and bright finish make it straightforward to inspect for wear. Machinists, tool-and-die technicians, and maintenance mechanics are the typical end users for this type of tooling.

Key Features

• Combination drill and countersink forms pilot hole and seat in one operation
• No. 6 trade size with 1/2 inch body diameter and 7/32 inch drill point diameter
• 60-degree included angle matches standard flat-head fastener geometry
• Double-end design provides two cutting ends for extended tool life
• High-speed steel construction with bright uncoated finish for easy wear inspection
• Right-hand cutting direction for standard drill press and handheld operation

Compatibility

Designed as a standard-shank combo drill countersink suitable for use in drill presses, CNC machining centers, and handheld drills accepting a 1/2 inch body diameter tool.

Installation Notes

Installation and use of this tool should be performed by a qualified machinist or trained technician. Secure the workpiece firmly before operation and confirm the spindle speed is appropriate for the material being cut. Inspect both cutting ends before use and replace the tool if chipping or excessive wear is observed. Follow all applicable shop safety procedures including eye protection and machine guarding requirements.