Hertel 18692 Countersink 1-1/4 in 82 Degree 4 Flute Hss

Product Description

The HERTEL 18692 is a 4-flute countersink designed for creating clean, chamfered seat profiles in metal workpieces. Built from high speed steel, it delivers consistent cutting performance across ferrous and non-ferrous materials. The 82-degree included angle matches the standard fastener head geometry used in most machine screw and flat-head bolt applications. With a 1-1/4 inch head diameter and a 1/2 inch straight-cylindrical shank, this countersink mounts directly in standard drill chucks or collet holders. It is suited for production shops, maintenance machinists, and fabricators who need a reliable, repeatable countersink profile.

The HERTEL 18692 is used in general metalworking and machining applications where precise countersink geometry is required for fastener seating. The 82-degree angle is the correct specification for the most common flat-head machine screw standards used in North American manufacturing. This tool is appropriate for use in drill presses, milling machines, and hand-held power tools equipped with a suitable chuck. It is typically used by machinists, tool-and-die workers, and maintenance technicians in both job shop and production environments.

Key Features

• 1-1/4 inch head diameter for coverage of standard and larger fastener clearance holes
• 82-degree included angle matches common flat-head machine screw geometry
• 4-flute design provides smooth cutting action and reduces chatter
• High speed steel construction for durability across a range of workpiece materials
• 1/2 inch straight-cylindrical shank for compatibility with standard drill chucks and collet holders

Compatibility

Designed as an OEM-style single-piece countersink for use in drill presses, milling machines, and power hand tools with a 1/2 inch or larger chuck or collet system accepting a straight-cylindrical shank.

Installation Notes

Installation is performed by machinists or qualified shop technicians. Secure the workpiece firmly before operation and ensure the machine spindle is fully stopped before inserting or removing the tool. Use appropriate cutting fluid for the workpiece material to extend tool life and improve finish quality. Follow applicable shop safety standards and machine manufacturer guidelines when setting spindle speed and feed rate.