Hertel H-81154050000 Combo Drill Countersink No. 5 Hss

Product Description

The HERTEL H-81154050000 is a combination drill and countersink designed for creating pilot holes and countersunk seats in a single operation. Built from high-speed steel (HSS) with a bright, uncoated finish, this tool accepts a No. 5 trade size with a 7/16 inch body diameter and a 3/16 inch drill point diameter. The 118-degree drill point angle establishes the pilot hole, while the 82-degree included angle forms the countersink profile. Overall length is 2-3/4 inches, making it compact enough for use in standard drill presses and manual drilling operations. Machinists, fabricators, and tool-and-die professionals use this type of combo tool to reduce setups and improve hole-to-countersink concentricity.

This combo drill countersink is suited for general metalworking and light fabrication applications where a clean, concentric countersink is required alongside a pilot hole. The plain cutting edge style and double end type make it a versatile shop tool for ferrous and non-ferrous metals. It is sold individually and is appropriate for bench-top drill press work, CNC setup applications, and manual machining environments where HSS tooling is specified.

Key Features

• Combination drill and countersink completes pilot hole and seat profile in one pass
• High-speed steel construction provides wear resistance across common metalworking materials
• 118-degree drill point angle for standard metal drilling entry
• 82-degree included angle for countersinking flathead fastener seats
• Double end design extends usable tool life
• Bright uncoated finish suitable for use with cutting fluids

Compatibility

Designed as an OEM-style replacement or direct substitute for No. 5 trade size combination drill countersink tooling used in standard metalworking drill press and manual machining applications.

Installation Notes

This tool is installed by machinists and toolroom technicians into compatible drill press chucks or collet holders sized for the 7/16 inch body diameter. Secure the tool firmly before operation and verify spindle speed is appropriate for the workpiece material and tool diameter. Always use cutting fluid on ferrous metals to extend tool life and improve finish quality. Inspect cutting edges before each use and remove the tool from service if chipping or excessive wear is observed.