Hertel H-81154070000 Combo Drill Countersink Size 7 Hss

Product Description

The HERTEL H-81154070000 is a combination drill and countersink tool designed to drill a pilot hole and countersink in a single pass. Built from high-speed steel with a bright, uncoated finish, it delivers reliable performance in ferrous and non-ferrous materials. The tool features a 118-degree drill point angle and an 82-degree included angle for the countersink profile. With a 5/8-inch body diameter and a 1/4-inch drill point diameter, it suits applications where a clean, accurate countersink seat is required alongside the drilled hole. Overall length is 3.25 inches. This is a plain cutting edge, non-tapered, non-aircraft-style tool intended for general machining and fabrication work.

This combo drill countersink is used in machine shops, fabrication facilities, and general metalworking applications. It is appropriate for countersinking fastener seats in steel, aluminum, and similar materials. The double-end design provides two usable cutting ends, extending tool life between replacements. Trade size 7 makes it a standard selection for countersinking applications where a 82-degree included angle is specified. It is typically installed in a drill press, milling machine, or CNC machining center using a standard collet or chuck system.

Key Features

• Combination drill and countersink in a single tool — drill and seat in one operation
• High-speed steel construction for durability in ferrous and non-ferrous materials
• Bright, uncoated finish — no coating buildup to affect dimensional accuracy
• Double-end design provides two cutting ends for extended service life
• 118-degree drill point angle with 82-degree countersink included angle
• Plain cutting edge, non-tapered body — fits standard collet and chuck setups

Compatibility

Designed as a standard trade size 7 combo drill countersink for use in drill presses, milling machines, and CNC machining centers equipped with a collet or chuck compatible with a 5/8-inch body diameter tool.

Installation Notes

Installation is performed by a machinist or tooling technician. Secure the tool firmly in a compatible collet or drill chuck before operation, and confirm the spindle is fully stopped before tool changes. Use appropriate cutting fluid or lubricant for the workpiece material to extend tool life and maintain hole quality. Follow applicable shop safety procedures and machine manufacturer guidelines for speed and feed selection.