The Star SR-20R is a CNC Swiss-type automatic lathe from Star Micronics, a builder whose sliding-headstock machines have earned a reputation for dependable small-part production in medical, aerospace, electronics, and precision job-shop environments. This 1999 SR-20R (Type 540) uses a sliding-headstock design that feeds bar stock through the cutting zone along Z, letting gang-mounted tools work close to the support point for accuracy on long, slender parts. The machine carries a gang tool post with O.D. turning tools, a power-driven cross-working tool block for milling, drilling, and tapping across the part, and a back-working sub-spindle that picks off the part for secondary operations on the cut-off end. Control is a Fanuc Series 18i-T CNC with a Star operator panel providing dedicated Head 1, Head 2, sub-spindle, and power-driven tool functions. The cell includes an LNS Hydrobar hydrodynamic bar feeder for continuous bar loading, a machine-mounted Tri-Mist mist collector, and flood coolant with articulating coolant lines. Electrical service is 200V, 50/60 Hz, 6.0 kVA, and the machine weighs approximately 2,000 kg (4,409 lbs), a compact footprint for a full Swiss turning cell.
The SR-20R builds on Star's earlier SR-20 sliding-headstock platform with a configuration centered on complete machining: the back-working sub-spindle and power-driven cross tools let parts that once required a second machine or manual secondary work be programmed for completion in one cycle. Its Fanuc Series 18i-T control is a step forward from the older Fanuc Series 16 and 18 generations, bringing faster processing and the i-series servo architecture to two-path Swiss programming. For shops moving up from cam-type automatics or simpler CNC sliding-headstock machines, the SR-20R delivers a more capable, more flexible way to run complex turned parts, with the LNS Hydrobar and Tri-Mist already integrated into the cell.