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The latest in the ST machine series from Star Micronics, the ST-20 comes equipped with the highest-ever specifications and functions in the 20mm class. Designed for high productivity and equipped with superb complex machining capability, the ST-20 makes a great choice for suppliers of high-value parts across many industries.
With some of Star’s most advanced simultaneous machining technology on board, the ST-20 provides six distinct varieties of front and rear end machining, enabling skewed hole drilling, front and back cross milling, and independent back machining. Both spindles are capable of the same level of machining, enabling complex parts to be completed to a high standard with incredibly short cycle times.
A formidable array of turret tool posts allows for a vast number of possible tooling configurations, reducing setup times and enabling seamless multi-process machining. The ST-20 is one of Star’s most progressive machines to date – backed up with our trademark reliability and class-leading support, it is a truly powerful and productive machining centre.
WORKPIECE |
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DIAMETER | ![]() |
20mm / 22.2mm (OPT) |
LENGTH | ![]() |
350mm |
GEOMETRY | ![]() |
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C AXIS | ![]() |
MAIN + SUB SPINDLE |
MAIN SPINDLE SIDE | |
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Number of axes | 12 |
Main spindle (headstock) | Z1 / C1 axis |
MAIN SPINDLE TURRETS | X1 / Y1 / X3 / Y3 / Z3 AXIS |
Max. machining diameter | 20 MM / 22.2 MM (OPTION) |
headstock stroke | 350 mm |
Main spindle power | 5.5 kW |
main spindle speed | 10,000 rpm |
Main spindle tooling | |
Turning tool | 12 MM SQ |
TURRET SLEEVE HOLDER CAPACITY | Ø 22 MM SLEEVES (ER16) |
MAX POWER DRIVEN TOOL (PDT) | 2.5KW |
max spindle (PDT) Speed | 5,750 RPM |
KINEMATIC DIAGRAM |
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SUB SPINDLE SIDE | |
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Sub spindle | X2 / Y2 / Z2 / C2 / YA2 AXIS |
Max. chucking diameter | 20 MM / 22.2 MM (OPT) |
SUB SPINDLE POWER | 5.5 kW |
sub spindle speed | 10,000 rpm |
Sub spindle tooling | |
turning tool | 12 MM SQ |
TURRET SLEEVE HOLDER CAPACITY | Ø 22 MM SLEEVES (ER16) |
MAX DRIVEN TOOL (PDT) POWER | 2.5 KW |
MAX (PDT) SPEED | 5,750 RPM |
FMB | BAR FEED DIMENSION A (MM) | ||
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Micromag 08-20 | 3415 (1.6M) | 5015 (3.2M) | 6015 (4.2M) |
Minimag 2-20 | 3415 (1.6M) | 5015 (3.2M) | 6015 (4.2M) |
Turbo 2-20 | 3215 (2.2M) | 4215 (3.2M) | 5215 (4.2M) |
Turbo 3-36 | 3320 (2.2M) | 4320 (3.2M) | 5320 (4.2M) |