Hertel 18726 Countersink 3/16 in 82 Degree 4 Flute Hss

Product Description

The HERTEL 18726 is a straight-shank countersink designed for deburring, chamfering, and seat preparation in metal fabrication and machining applications. Built from high speed steel, it delivers the hardness and heat resistance needed for consistent performance in ferrous and non-ferrous materials. The 3/16 inch head diameter pairs with an 82-degree included angle — the standard angle for flat-head fastener seating in inch-based applications. With 4 flutes, the tool produces a smoother finish and more controlled chip evacuation compared to single- or two-flute designs. Machinists, tool and die workers, and maintenance technicians are the typical users of this tool class.

This countersink is suited for bench drill presses, CNC machining centers, and hand drill applications where a small-diameter, straight-shank tool is required. The 3/16 inch shank diameter fits standard collets and drill chucks without adapters, making it practical for quick changeovers in production and repair environments. The 82-degree angle is commonly specified for flat-head machine screws and aerospace-style fasteners in sheet metal and light structural work.

Key Features

• High speed steel construction for hardness and thermal resistance in metal cutting
• 82-degree included angle matches the standard seating angle for flat-head inch fasteners
• 4-flute design promotes smoother finish and improved chip clearance
• 3/16 inch straight-cylindrical shank fits standard collets and drill chucks directly
• Compact 3/16 inch head diameter suited for small fastener hole prep and tight clearances

Compatibility

Designed as an OEM-style replacement or standard tooling option for drill presses, machining centers, and hand-held drill applications requiring a 3/16 inch straight-shank countersink with an 82-degree included angle.

Installation Notes

A licensed machinist or qualified maintenance technician should set spindle speed appropriate to the workpiece material before use. Secure the workpiece firmly before engaging the tool, and ensure the drill chuck or collet is fully tightened on the straight-cylindrical shank. Wear appropriate eye protection and follow applicable shop safety standards when operating rotary cutting tools.