940 Series

The 940 Series is Sonic's solid carbide engraver for fine-line engraving and V-carving. Every 940 has a flat tip, 0.004"–0.024", and the tip width sets the narrowest line it cuts. Shops use it for part marking, logos, serial numbers, and fine detail: lines and inside corners too small for a sturdy end mill. An end mill leaves an inside corner radius of half its diameter.

The page carries the 941 at a 60° included angle (tips 0.004"–0.016") and the 942 at 90° (tips 0.004"–0.024"). For the same line width, the 60° cuts deeper. The single flute has a flat-edged helical design that clears chips and keeps burrs down.

Sonic offers the 940 in AlTiN for steel, titanium alloys, and Inconel, and in TiB2 for aluminum and other non-ferrous materials. 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.