Star SC-20
Image: starcnc.com, Star Micronics
Key Specifications
max bar capacity
max machining diameter
max turning diameter
turret stations
How much does the Star SC-20 cost?
Estimated price range
Our best estimate for a swiss-type lathe in this class — not a quote from Star Micronics. Configuration moves it a long way.
Overview
The Star SC-20 is a Swiss-type lathe in the 20 mm class. Maximum bar capacity and maximum machining diameter are both 20 mm (0.787 in), which the table also gives as Ø20mm (25/32in), and the turning tool arrangement is selectable between 6 tools and 5 tools on 12mm shanks.
That is all the table states, so the SC-20 cannot be sized for a job from this page alone. Spindle speed, spindle power, headstock stroke, rapid traverse and machine weight are not listed and should be asked for with a quotation. For reference among Star's other 20 mm machines, the SR-20R II lists 32 m/min rapid traverse, and the SV-20 lists its turning tools as options: 4 tools (16mm) or 5 tools (12mm). The SB-20RII offers ø25.4mm (1in) bar as an option, which the SC-20 table does not.
Full Specifications
| Parameter | Value |
|---|---|
| Max Bar Capacity | 20 mm (0.787 in) |
| Max Machining Diameter | 20 mm (0.787 in) |
| Max Turning Diameter | Ø20mm (25/32in) |
| Turret Stations | 6 tools or 5 tools (12mm): selectable |
Specifications sourced from starcnc.com — verified 2026-10-03
Strengths & Limitations
Strengths
- 20 mm (0.787 in) bar capacity and machining diameter
- Turning tool arrangement is selectable: 6 tools or 5 tools on 12mm shanks
Limitations
- No spindle speed, spindle power, stroke or weight is listed, so those figures must come from Star before the machine can be matched to a part
- Bar size ends at 20 mm (0.787 in) with no larger option in the table, where the SB-20RII lists ø25.4mm (1in) as an option
Best For
Frequently Asked Questions
01
The maximum bar capacity is 20 mm (0.787 in), and the maximum machining diameter is the same. The table shows no optional larger size for the SC-20.
02
The row reads 6 tools or 5 tools (12mm), selectable. In other words the count is a choice made when the machine is configured, and both arrangements use 12mm shanks. The table does not say what the freed position is used for in the 5-tool arrangement, so ask Star which layout suits your parts.
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