Hertel 18654 Countersink 3/4 in 82 Degree 4 Flute Hss

Product Description

The HERTEL 18654 is a high speed steel countersink designed for producing clean, accurately angled seat profiles in metal workpieces. With a 3/4 inch head diameter and an 82-degree included angle, it is sized for standard flat-head fastener applications common in machining and fabrication. The 4-flute geometry provides smooth cutting action and reduces chatter during operation. The straight-cylindrical 1/2 inch shank mounts directly into standard drill chucks or collet holders. This tool is well suited for machinists, tool and die workers, and maintenance professionals working with ferrous and non-ferrous metals.

This countersink is used in general machining, production drilling operations, and bench work where flat-head screws or bolts require a properly angled seat. The 82-degree angle matches the seating requirement for most standard flat-head machine screws used in industrial and commercial applications. It is appropriate for use in manual drill presses, CNC machining centers, and handheld power tools equipped with a 1/2 inch chuck or collet system.

Key Features

• 3/4 inch head diameter for standard flat-head fastener countersinking
• 82-degree included angle matches common flat-head machine screw seat geometry
• 4-flute design reduces chatter and produces a smooth finish
• High speed steel construction provides durability across ferrous and non-ferrous materials
• Straight-cylindrical 1/2 inch shank fits standard chucks and collet holders

Compatibility

Designed as a standard straight-shank countersink for use in drill presses, milling machines, and handheld power tools with a 1/2 inch or larger chuck capacity.

Installation Notes

Installation is performed by machinists or qualified tradespeople familiar with rotary cutting tools. Secure the shank fully in the chuck or collet before operation and verify runout is within acceptable limits. Always power down and lock out the machine before changing tooling. Use appropriate cutting fluid for the workpiece material to extend tool life and improve finish quality.