Star SR-20J

A new Star SR-20J typically runs between $150,000 and $250,000 depending on configuration, tooling package, and options. The Type C (guide bushing) and Type N (non-guide bushing) models are priced similarly. Used SR-20J machines from 2010-2018 typically sell for $50,000-$100,000 depending on condition, hours, and included tooling. Bar feeders are usually an additional $15,000-$30,000.

The Type C uses a rotary guide bushing, which supports the bar stock near the cutting zone for maximum rigidity on long, slender parts. The Type N eliminates the guide bushing, allowing shorter bar remnants and better material utilization on shorter parts. Some configurations are convertible between both modes. The Type C excels at parts with high length-to-diameter ratios, while the Type N is better for shorter, stockier components.

Both are top-tier 20mm Swiss lathes competing directly. The Star SR-20J offers a hydraulic-free design and Star's Motion Control System for cycle time optimization. The Citizen L20 counters with Citizen's LFV (Low Frequency Vibration) chip-breaking technology, which is a major advantage when machining gummy materials like stainless steel and titanium. The SR-20J typically has a slight edge in tool position density, while the L20 offers more spindle speed in some configurations. Both are excellent choices—the decision often comes down to dealer support in your region.

The SR-20J handles the full range of Swiss-type materials: free-machining brass, aluminum, carbon steel, stainless steel (303, 304, 316), titanium (Ti-6Al-4V), Inconel, Kovar, MP35N, and engineering plastics like PEEK and Delrin. The 10,000 RPM main spindle provides good surface speed for both non-ferrous high-speed work and lower-speed exotic alloy machining.

Yes. The SR-20J is designed for lights-out production when paired with a magazine bar feeder. The machine's parts catcher, chip conveyor, and oil mist collection system support extended unattended operation. Most production shops run the SR-20J with LNS, FMB, or IEMCA bar feeders for continuous bar-fed operation across multiple shifts.

The SR-20JII is the updated successor to the SR-20J, featuring refined tooling configurations, improved Motion Control System, and updated control software. The core capabilities—20mm bar capacity, 10,000 RPM main spindle, and 7-axis configuration—remain similar. The JII models typically offer incremental improvements in cycle time, tooling flexibility, and ease of setup rather than fundamental architectural changes.