200C Series

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The 200C Series is Sonic's 3-flute chipbreaker end mill for aluminum, copper, and plastics. Chipbreaker geometry interrupts chip formation before length and mass create evacuation problems in deep pocket milling and full-width slotting. Standard flute geometry in these operations produces long continuous chips that pack the flutes. Compared with a plain flute, Sonic's chipbreaker pattern is set for a higher feed rate and still leaves a good wall finish.

Every 200C is a square end mill with a small R0.004"–0.008" (0.1–0.2 mm) radius to protect the corner. For corner-radius sizes or diameters up to 1", see the 200.

Sonic offers the 200C in TiB2. TiB2 has a low affinity for aluminum, so less material builds up on the edge. Sonic grinds every shank to h6 for precision holders and leaves a ground finish, not a polished one, so the shank resists slipping. Every tool is engraved with its lot number for traceability.