Hertel H-81155L03040 Combo Drill Countersink Hss Size 3

Product Description

The HERTEL H-81155L03040 is a combination drill and countersink tool designed to drill a pilot hole and chamfer a countersink seat in a single operation. Built from high-speed steel with a bright, uncoated finish, this tool handles the full countersinking workflow on ferrous and non-ferrous materials without a tool change. It carries a trade size of 3, a body diameter of 0.25 inches, and an overall length of 4 inches. The 118-degree drill point angle is standard for general-purpose drilling, and the 90-degree included angle produces a clean countersink seat for flat-head fasteners. Machinists, fabricators, and maintenance technicians use this type of tool in both production and repair settings.

This combo drill countersink is suited for use in machine shops, metal fabrication facilities, and maintenance operations where flat-head screw seating or deburring is required. The long-length designation provides added reach for deeper workpieces or setups where clearance is a factor. The plain cutting edge style and non-tapered, non-aircraft body make this a straightforward general-purpose countersinking tool. It is sold and packaged as a single unit.

Key Features

• High-speed steel construction for durability on a range of workpiece materials
• Bright, uncoated finish for general-purpose use without coating-related heat considerations
• 118-degree drill point angle for standard general-purpose drilling applications
• 90-degree included angle produces accurate flat-head fastener countersink seats
• Long-length tool design provides added reach in deep or clearance-restricted setups
• Double end type allows use of both ends, extending tool service life

Compatibility

Designed as a general-purpose combo drill countersink for use in standard drill presses, CNC machining centers, and hand-held power tools with compatible collets or chucks accepting a 0.25-inch body diameter shank.

Installation Notes

This tool is installed and used by machinists, tool and die workers, and maintenance technicians operating drill presses or CNC equipment. Before mounting, ensure the spindle or chuck is fully de-energized and locked out per site lockout-tagout procedures. Verify that the collet or chuck is rated for the 0.25-inch body diameter before securing the tool. Do not exceed the recommended feed rate or spindle speed for the workpiece material to avoid premature tool wear or breakage.