STAR SR-20J HORIZONTAL MACHINING CENTER

Technical Description

The Star SR-20J is a CNC Swiss-type automatic lathe featuring a Fanuc 18i-TB control system with 7-axis capability and full C-axis indexing on both main and sub-spindles. The machine accommodates 20mm bar stock with a maximum turning diameter of 0.780" and main spindle stroke of 6.780", enabling efficient production of precision components. Equipped with a 5 HP main spindle operating at 10,000 RPM and a 3 HP sub-spindle running at 8,000 RPM, the SR-20J delivers robust cutting performance for simultaneous front and back working operations. The machine combines six turning tools with four independently operated rear-working tools and up to five driven tools as standard, with maximum capability of 14 power-driven tools. Its slant-type slide guideway structure ensures rigid, high-accuracy machining while maintaining compact dimensions of 2,250 x 1,200 x 1,700mm and a total weight of 2,200kg. The SR-20J offers 35 m/min rapid traverse rates across all axes and features independent deep-hole drilling capabilities on the main spindle with drilling capacity up to 8mm using stationary tools. Available in Type C (with guide bush) or Type N (non-guide bush) configurations, the machine supports optional front drilling units, high-pressure coolant systems, and automatic bar feeders, providing flexibility for diverse manufacturing applications requiring precision turning, milling, drilling, and tapping operations.