The Citizen Cincom A20-3F7 is a 20mm sliding-headstock Swiss-type CNC lathe built on Citizen's reputation for unattended, tight-tolerance turning that has made it a staple in medical, aerospace, electronics, and high-volume precision component shops. This 2019 machine pairs a 10,000 RPM main spindle with a fully programmable back-working sub-spindle running up to 8,000 RPM, so complete front-and-back parts are finished in a single cycle. It carries up to 21 tools with driven, live rotary tooling to 6,000 RPM for cross and end drilling, milling, and tapping, plus a Y-axis on the gang tool zone for off-center and contour features. With a 0.787 in (20 mm) guide-bushing bar capacity, up to roughly 7.87 in (200 mm) of machining length, and Citizen's Meldas-based Cincom control, it excels at long, slender, small-diameter parts held to microns with fast, familiar programming.
Compared with earlier-generation 20mm Citizen Swiss autos such as the mid-2000s Cincom L20, the A20-3F7 is a meaningfully better machine, not merely a newer one. Its current-generation Meldas-based Cincom control speeds program editing and setup over older control platforms, an integrated Y-axis expands it beyond simple gang turning into off-center milling and contouring, and the fully programmable 8,000 RPM back-working sub-spindle turns what used to be secondary operations into finished, single-cycle parts. Combined with 21-tool capacity and tightened headstock rigidity for better finish and tool life, the A20-3F7 lets a shop step up to modern complete-part Swiss machining while its operators keep working the way they already know.