Hertel 18642 Countersink 5/8 in 82 Deg 4 Flute Hss

Product Description

The HERTEL 18642 is a single-pass countersink designed for creating angled seat holes in metal, wood, and composite materials. Built from high speed steel, this tool delivers consistent cutting performance across a wide range of workpiece materials. It features a 5/8 inch head diameter and an 82-degree included angle, making it suited for flat-head fastener preparation where precise seating geometry is required. The 3/8 inch straight cylindrical shank provides secure chuck retention in standard drill presses and hand drills. With 4 flutes, the tool distributes cutting load evenly and reduces chatter during operation. Licensed machinists, toolmakers, and maintenance tradespeople reach for this countersink in production and repair settings alike.

This countersink is used in metalworking, fabrication, and general maintenance applications where flat-head machine screws or bolts must sit flush with or below a workpiece surface. The 82-degree included angle matches the standard geometry for imperial flat-head fasteners commonly used in sheet metal and structural assemblies. It performs reliably in drill press, CNC, or hand-drill setups and is appropriate for both light production runs and occasional service work.

Key Features

• 5/8 inch head diameter sized for common flat-head fastener prep work
• 82-degree included angle matches standard imperial flat-head screw geometry
• 4-flute design distributes cutting forces and reduces chatter
• High speed steel construction maintains edge integrity across varied workpiece materials
• 3/8 inch straight cylindrical shank fits standard drill chucks and collets

Compatibility

Designed as a standard-geometry countersink for use with drill presses, CNC machines, and hand drills equipped with a 3/8 inch or larger chuck capacity. Suitable for applications requiring an 82-degree countersink seat.

Installation Notes

Countersinks should be installed by machinists or maintenance tradespeople familiar with rotating cutting tools. Secure the shank fully in the chuck before operation and confirm the spindle is stopped and power is off before changing or adjusting the tool. Use appropriate cutting fluid when countersinking ferrous metals to extend tool life and improve finish quality. Follow applicable shop safety standards and machine guarding requirements during all cutting operations.