Hertel H-81155L01030 Combo Drill Countersink Hss

Product Description

The HERTEL H-81155L01030 is a combination drill and countersink designed for simultaneous drilling and countersinking in a single pass. Built from high speed steel with a bright polished finish, this double-end tool features a 1/8 inch body diameter, a 3/64 inch drill point diameter, and a 118-degree drill point angle. The 90-degree included angle on the countersink portion produces clean, accurate seat geometry. With a 3 inch overall length, the H-81155L01030 suits long-reach applications where standard-length tools fall short. Machinists, toolmakers, and fabricators use this type of tool on manual mills, drill presses, and CNC equipment when countersink accuracy and cycle-time reduction are priorities.

This combination tool is suited for metalworking applications requiring a countersunk hole for flat-head fasteners. The double-end design extends tool life by providing two usable cutting ends. The plain cutting edge style makes it appropriate for use in steel, aluminum, and similar machinable materials. Trade size No. 1 classifies the countersink diameter within the standard combination drill-countersink sizing system, and the long-length configuration accommodates workholding setups where extra reach is needed between the spindle and the workpiece surface.

Key Features

• Combination drill and countersink completes two operations in one pass
• High speed steel construction provides durability across a range of machinable metals
• Bright polished finish reduces friction and aids chip evacuation
• Double-end design doubles the usable cutting life of each tool
• 118-degree drill point angle suits general-purpose metalworking applications
• 90-degree included angle produces standard countersink geometry for flat-head fasteners
• Long-length at 3 inches overall accommodates extended-reach setups

Compatibility

Designed as an OEM-style replacement or direct substitute for No. 1 trade size combination drill countersinks used in standard metalworking and machining applications.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Secure the tool firmly in an appropriate collet or drill chuck rated for the 1/8 inch shank diameter before use. Ensure the spindle is fully stopped and the machine is powered down before changing or inspecting the tool. Follow the machine manufacturer and applicable shop safety guidelines for speeds and feeds when operating combination drill-countersink tooling.