Hertel 300-002007 Combo Drill Countersink 7/16 Inch Solid Carbide

Product Description

The HERTEL 300-002007 is a combination drill and countersink tool designed to drill a pilot hole and countersink in a single operation. Built from solid carbide with a bright polished finish, this tool delivers consistent performance in ferrous and non-ferrous materials where precision entry angles are critical. It features a 3/16-inch drill point diameter, an 82-degree included angle, and a 118-degree drill point angle. The right-hand cutting direction and plain cutting edge style make it compatible with standard CNC machining centers, drill presses, and hand-operated machines. It is sized as a trade size 5 with a 7/16-inch body diameter and a 2-3/4-inch overall length.

This combo drill countersink is suited for metalworking applications where a flat-head fastener seat must be formed at the same time as the through-hole or pilot hole. Typical use cases include aerospace-adjacent fabrication, sheet metal work, and general machining operations requiring an 82-degree countersink angle. The double-end design provides extended service life by offering two usable cutting ends. It is installed by machinists and metalworking technicians in job shop, production, and MRO environments.

Key Features

• Solid carbide construction for hardness and wear resistance in demanding materials
• Bright polished finish reduces friction and aids chip evacuation
• Combines pilot drilling and countersinking into a single tool pass
• Double-end design extends usable tool life
• 82-degree included angle matches standard flat-head fastener geometry
• Right-hand cut for use with standard rotating spindles

Compatibility

Designed as an OEM-style replacement or direct-use combo drill countersink for metalworking operations requiring a trade size 5, 7/16-inch body diameter tool with an 82-degree countersink angle.

Installation Notes

This tool is installed by machinists and metalworking technicians in drill presses, milling machines, or CNC machining centers. Secure the shank firmly in a collet or drill chuck before operation and verify spindle speed is appropriate for the material and tool diameter. Solid carbide tooling is brittle and should not be subjected to side loads or interrupted cuts beyond design parameters. Inspect cutting edges before each use and remove the tool from service if chipping or wear is observed.