Hertel S-74148347 Combo Drill Countersink Size 7 Hss

Product Description

The HERTEL S-74148347 is a combination drill and countersink designed for creating pilot holes and chamfered seat profiles in a single pass. Built from high-speed steel with a bright, uncoated finish, this tool handles countersinking operations in metal, wood, and composite materials without requiring a tool change. The body diameter is 5/8 inches, the drill point diameter is 1/4 inch, and the included angle is 60 degrees, making it suited for standard countersink fastener seating. Overall length is 3-1/4 inches. It is a right-hand cut, double-end tool, and it is not tapered.

This combo drill countersink is used in metalworking, fabrication, and general machining applications where a pilot hole and countersink must be produced in one operation. The plain cutting edge style and double-end configuration make it efficient for production and maintenance environments. Machinists, tool and die techs, and fabricators working in job shops, MRO settings, and light manufacturing will recognize this as a standard bench and drill press tool. It is not an aircraft-style or long-length variant.

Key Features

• Combination drill and countersink completes two operations in a single pass
• High-speed steel construction provides durability across a range of workpiece materials
• 60-degree included angle suits standard flat-head fastener countersinking
• Double-end design extends usable tool life
• Bright uncoated finish for general-purpose use without coating-related compatibility concerns
• Right-hand cut matches standard drill press and lathe spindle rotation

Compatibility

Designed as a standard size 7 combo drill countersink for use in drill presses, lathes, and CNC machining centers that accept straight-shank tooling appropriate to the 5/8-inch body diameter.

Installation Notes

This tool is installed and operated by machinists and fabricators using standard machine tool practices. Secure the workpiece before operation and verify the spindle speed is appropriate for the workpiece material and tool diameter. Inspect the cutting edges before use and replace if chipping or wear is present. Follow applicable shop safety protocols when handling and storing HSS cutting tools.