Robet Charles Imperial Piloted Countersink - 3 Flutes Integral Pilot Straight Shank - 5/32 Pilot Diameter - 100° Inclusive Angle

The Robet Charles Imperial piloted countersink is engineered for precise, repeatable countersinking in precision machining. With a 3-flute cutting design and an integral pilot on a straight shank, it delivers accurate hole alignment, smooth cutting action, and reduced chatter. The 5/32" pilot diameter and 100° included angle make it a reliable choice for aerospace, automotive, and general engineering applications. The pilot diameter tolerance is held to −0.0005" to −0.0015", delivering consistent, concentric results across production runs.

• Integral pilot for precise hole alignment: The integrated pilot keeps the countersink centered with the hole during cutting, ensuring consistent entrance and seating of fasteners and reducing the chance of off-center countersinks.
• Tight pilot-diameter tolerance (−0.0005" to −0.0015"): Maintains concentricity from part to part, so each countersink matches the intended hole pattern for reliable assembly and reduced rework.
• 3-flute design with 100° countersink angle: Provides efficient material removal, smoother cutting, and a clean, flush finish with less chatter, even in harder materials.

Using the Robet Charles Imperial piloted countersink helps you complete countersinking tasks faster and more reliably. You gain repeatable, concentric countersinks that align with your hole patterns, reduce rework, and support high-quality assemblies across aerospace, automotive, and general engineering projects. The straight shank design, integrated pilot, and tight tolerances work together to minimize setup time and maximize first-pass acceptance, delivering consistent, professional finishes every time.