Hertel S-74148313 Combo Drill Countersink Size 4 Hss

Product Description

The HERTEL S-74148313 is a combination drill and countersink designed for simultaneous drilling and countersinking in a single pass. Built from high-speed steel with a bright, uncoated finish, this tool features a 5/16 inch body diameter, a 1/8 inch drill point diameter, and a 60-degree included angle. Overall length is 2-1/8 inches. The double-end configuration extends tool life by providing two usable cutting ends. Right-hand cut geometry suits standard drill press and hand-held drilling setups. This tool is suited for machinists, metalworkers, and maintenance technicians working with countersunk fastener holes.

This combo drill countersink is used in metal fabrication, maintenance, and general machining applications where countersunk holes are required for flat-head fasteners. Trade Size 4 and the 1/8 inch point diameter make it appropriate for light-duty countersinking tasks in steel, aluminum, and similar materials. The plain cutting edge style and non-tapered, non-aircraft geometry indicate a standard production or repair application rather than aerospace-spec work. It fits standard drill chucks and is compatible with bench-top drill presses and handheld electric drills.

Key Features

• High-speed steel construction for durability across ferrous and non-ferrous metals
• 60-degree included angle sized for standard flat-head fastener countersinks
• Double-end design provides two cutting ends, extending usable tool life
• Bright, uncoated finish suitable for general-purpose countersinking
• Right-hand cut compatible with standard drill press and handheld drill setups
• Compact 2-1/8 inch overall length fits tight work envelopes

Compatibility

Designed as a standard combo drill countersink for use with conventional drill chucks in bench-top drill presses and handheld electric drills. Suitable for countersinking flat-head fastener holes in steel, aluminum, and similar materials in general machining and maintenance applications.

Installation Notes

Install this tool in a standard drill chuck and secure firmly before operation. Ensure the workpiece is clamped or fixtured to prevent movement during drilling and countersinking. Use appropriate cutting fluid when working with harder metals to reduce heat buildup and extend tool life. Inspect both cutting ends before use and rotate to the unused end when the first shows wear.