Robet Charles Imperial Piloted Countersink - 3 Flutes Integral Pilot Straight Shank - 3/16 Pilot Diameter - 100° Inclusive Angle

The Robet Charles Imperial piloted countersink is a precision cutting tool designed for repeatable countersinking in high-accuracy machining. With a 3-flute cutting design and an integral pilot, it delivers accurate hole alignment, smooth cutting action, and reduced chatter.

Manufactured to tight tolerances, the pilot diameter is held to −0.0005" to −0.0015", providing consistent, concentric results ideal for aerospace, automotive, and general engineering applications including production runs and prototypes.

• Integral Pilot for Accurate Alignment: Built-in pilot guides the countersink into the hole center, ensuring precise alignment and reducing drift during entry.
• 3-Flute Design with 100° Included Angle: Three-flute geometry delivers smooth cutting, efficient chip evacuation, and a clean countersink finish, with a 100° included angle for consistent results across common materials.
• 3/16 in Pilot Diameter with Tight Tolerance: Pilot diameter is held to −0.0005" to −0.0015", ensuring repeatable, concentric countersinks and reliable performance across aerospace, automotive, and general engineering applications.

Designed to streamline setups and deliver consistent, concentric countersinks, this tool helps you move quickly from roughing to finishing with confidence. The integrated pilot reduces drift and chatter, so you can trust first-pass accuracy across parts. With the pilot diameter tightly controlled, you’ll see repeatable results from part to part, minimizing rework and supporting high-quality assemblies in aerospace, automotive, and general engineering environments.