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Star ST-20

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.

Star ST-20

WORKPIECE

DIAMETER Diameter 20mm / 22.2mm (OPT)
LENGTH Length 350mm
GEOMETRY Geometry
C AXIS C Axis MAIN + SUB SPINDLE

Benefits

  • 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

Specification

MAIN SPINDLE SIDE
Number of axes12
Main spindle (headstock)Z1 / C1 axis
MAIN SPINDLE TURRETSX1 / Y1 / X3 / Y3 / Z3 AXIS
Max. machining diameter20 MM / 22.2 MM (OPTION)
headstock stroke350 mm
Main spindle power5.5 kW
main spindle speed10,000 rpm
Main spindle tooling
Turning tool12 MM SQ
TURRET SLEEVE HOLDER CAPACITYØ 22 MM SLEEVES (ER16)
MAX POWER DRIVEN TOOL (PDT)2.5KW
max spindle (PDT) Speed5,750 RPM
KINEMATIC DIAGRAM
Star ST-20 - Kinematic Diagram
SUB SPINDLE SIDE
Sub spindleX2 / Y2 / Z2 / C2 / YA2 AXIS
Max. chucking diameter20 MM / 22.2 MM (OPT)
SUB SPINDLE POWER5.5 kW
sub spindle speed10,000 rpm
Sub spindle tooling
turning tool12 MM SQ
TURRET SLEEVE HOLDER CAPACITYØ 22 MM SLEEVES (ER16)
MAX DRIVEN TOOL (PDT) POWER2.5 KW
MAX (PDT) SPEED5,750 RPM
FMBBAR FEED DIMENSION A (MM)
Micromag 08-203415 (1.6M)5015 (3.2M)6015 (4.2M)
Minimag 2-203415 (1.6M)5015 (3.2M)6015 (4.2M)
Turbo 2-203215 (2.2M)4215 (3.2M)5215 (4.2M)
Turbo 3-363320 (2.2M)4320 (3.2M)5320 (4.2M)
Star SB-20R Type G - Dimensions

More information

More Information - Accessories More Information - Technical Review More Information - Configurations
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