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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.


DIAMETER Diameter 20mm / 22.2mm (OPT)
LENGTH Length 350mm
GEOMETRY   Geometry


  • Standard machining diameter 20mm (22.2mm OPT)
  • Z1 Stroke of 350mm
  • Twin turrets on main spindle for balanced turn-mill operations
  • Powerful 5.5Kw on main & sub spindles
  • Z3 axis enables SUPER-POSITION control for increased overlap
  • YA2 axis on sub-spindle enables off-center pick up
  • Tool pre-setter included for easy tool set-up
  • STAR MOTION CONTROL to minimize idle time
  • Independent turret for sub-spindle for maximum overlap