Hertel H-81186010500 Combo Drill Countersink 1/8 in Cobalt

Product Description

The HERTEL H-81186010500 is a combination drill and countersink designed for drilling a pilot hole and chamfering in a single operation. Built from cobalt high-speed steel, this tool handles tough materials including stainless steel, hardened alloys, and heat-resistant metals. It features a 118-degree drill point angle and a 60-degree included countersink angle. The body diameter is 1/8 inch, with a drill point diameter of 3/64 inch and a drill point length of 3/64 inch. Overall length is 5 inches. The bright, uncoated finish makes it straightforward to inspect for wear during service intervals. A licensed machinist, tool-and-die technician, or industrial maintenance professional typically installs and operates this tool.

This combo drill countersink is suited for general metalworking, maintenance, repair, and fabrication applications where a countersunk seat must be prepared for flat-head fasteners. The double-end style and long-length configuration extend tool life and provide reach in deep or confined workpieces. It is appropriate for use in drill presses, CNC machining centers, and hand-held power tools when fitted with the correct chuck. Plain cutting edge construction keeps geometry simple and predictable for standard countersinking tasks across a range of base materials.

Key Features

• Cobalt high-speed steel construction for heat and wear resistance in tough materials
• 118-degree drill point angle for general-purpose drilling in metal
• 60-degree included angle for standard flat-head fastener countersinking
• Double-end style extends usable tool life
• Long-length design at 5 inches overall for added reach
• Bright, uncoated finish for easy visual inspection of cutting edge condition

Compatibility

Designed as an OEM-style replacement or direct-use combination drill countersink for metalworking applications requiring Trade Size 1, 1/8-inch body diameter tooling in standard drill chucks and collet holders.

Installation Notes

Installation and use should be performed by a qualified machinist or industrial maintenance technician familiar with rotary cutting tools. Secure the workpiece firmly before operation and confirm chuck or collet grip is correct for the 1/8-inch body diameter. Inspect the cutting edges before each use and replace the tool at the opposing end when one end shows wear. Follow applicable OSHA machine guarding and personal protective equipment requirements when operating drill presses or machining centers.