Four Flute Large Size Countersinks

Champion 799L Four-Flute Large Size Countersinks — Heavy-Duty Machine Countersinking for Large Diameters

The Champion 799L Four-Flute Large Size Countersinks are heavy-duty machine countersinks designed for large-diameter chamfering and countersinking in metalworking and industrial machining applications. Built specifically for rigid setups, the 799L series delivers precise, smooth countersinks where standard small-diameter tools are insufficient.

Manufactured from high-speed steel (HSS), Champion 799L countersinks feature a four-flute cutting geometry that evenly distributes cutting forces, improves stability, and produces consistent surface finishes on large holes. These countersinks are ideal for use in drill presses, CNC machines, and machining centers where accuracy, concentricity, and repeatability are essential.

The large cutting diameter range of the 799L series makes them well suited for structural components, heavy fabrication, large fastener seating, and industrial parts where clean, uniform chamfers are required.

Key Benefits

• Large-diameter countersinking capability for oversized holes and fasteners.
• Four-flute geometry provides balanced cutting and smooth finishes.
• High-speed steel construction for durability in demanding machining environments.
• Excellent concentricity for precise flat-head fastener seating.
• Optimized for rigid machine setups and production operations.

Materials & Applications

Use appropriate speeds and feeds for large-diameter tools. Best performance achieved in rigid machine setups. Wear PPE and follow machining safety practices.