Hertel H-81154L05050 Combo Drill Countersink Size 5 Hss

Product Description

The HERTEL H-81154L05050 is a combination drill and countersink designed for precise pilot drilling and seat preparation in a single operation. Built from high-speed steel (HSS) with a bright polished finish, this long-length tool features a 7/16 inch body diameter, a 3/16 inch drill point diameter, and an 82-degree included angle suited for standard countersink work. At 5 inches overall length, the H-81154L05050 provides added reach for deeper setups or workholding configurations that limit access. Machinists and tool-and-die professionals use this style of combo tool to reduce tool changes and maintain concentricity between the pilot hole and countersink seat.

This combo drill countersink is intended for general countersinking applications across metalworking, fabrication, and light production environments. The plain cutting edge style and double-end configuration are suited for standard bench and CNC drilling setups where controlled seat angles are required. The 118-degree drill point angle provides good centering performance on flat and slightly curved workpiece surfaces. Sold individually, this tool fits operations requiring a No. 5 trade-size countersink in HSS without a coating.

Key Features

• High-speed steel construction for durability across a range of ferrous and non-ferrous materials
• Bright polished finish reduces friction and chip buildup during cutting
• 82-degree included angle for standard countersink seat geometry
• 118-degree drill point angle for accurate self-centering entry
• Double-end design extends usable tool life
• Long-length body at 5 inches overall length for extended reach applications

Compatibility

Designed as an OEM-style replacement or direct-use combo drill countersink for standard metalworking and fabrication setups requiring a No. 5 trade size, 7/16 inch body diameter countersink tool in high-speed steel.

Installation Notes

This tool is installed and operated by machinists or trained fabricators using standard drill presses, CNC machining centers, or hand-held drilling equipment rated for the appropriate spindle speed. Secure the tool firmly in the chuck or collet before operation and verify runout before cutting. Do not exceed the recommended cutting speed for the workpiece material. Inspect the cutting edges before each use and remove the tool from service if chipping or wear is observed.