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Star SR-20JII

The SR-20JII Type B improves upon the long-serving SR-20J model, offering increased rigidity, accuracy and versatility through a combination of improved engineering and expanded functionality.

Combining a 6-tool turning platen with a 5-spindle cross drilling unit and an 8-spindle back working tool post, the SR-20JII boasts impressive tooling capacity allowing for a huge range of machining options.

The updated design features dovetail slideways for the X1, Y1, Z2 and Y2 axes improving the machine’s rigidity – ensuring stable, repeatable results even when cutting the most challenging materials.

The sub-spindle speed, power and accuracy have also been increased by adopting a built-in spindle motor offering 10,000 rpm and 3.7Kw.

The SR-20JII Type B represents the latest evolution in 20mm sliding head machining – and the most advanced technology of its type on the market.

Star SR-20JII

WORKPIECE

DIAMETER Diameter 20mm / 22.2mm (OPT)
LENGTH Length 205mm
GEOMETRY Geometry
C AXIS C Axis MAIN + SUB SPINDLE

Benefits

  • Improved metal removal rates with increased power on driven tools and sub-spindle
  • Switchable between guide bush and non-guide bush modes
  • Main and sub spindle speed 10,000 rpm / power 3.7Kw
  • Reduced cycle times due to more overlapped machining possibilities
  • Improved rigidity due to dovetail guideway structure
  • Increased flexibility due to more tooling configurations
  • Improved ergonomics with large cutting room and headstock "up and over" doors
  • Increased accuracy due to built-in spindle motors

Specification

MAIN SPINDLE SIDE
Number of axes8
Main spindle (headstock)Z1 / C1 axis
Tool postX1 / Y1 axis
Max. machining diameter20 mm / 22.2 mm (option)
headstock stroke (swiss type / ngb mode)205 mm
Main spindle power3.7 kW
main spindle speed10,000 rpm
main spindle tooling
Turning tool6 tools @ 12 mm SQ
DRILLING ARM SLEEVE HOLDER CAPACITY5 x Ø 22 MM SLEEVES (ER16)
POWER DRIVEN TOOL (PDT) POSITIONS3 + 2 MODULAR STATIONS
MAX (PDT) SPEED8,000 rpm
KINEMATIC DIAGRAM
Star SR-20J - Kinematic Diagram
SUB SPINDLE SIDE
Sub spindleX2 / Y2 / Z2 / C2 axis
Max. chucking diameter20 mm / 22.2 mm (option)
sub spindle power3.7 kW
sub spindle speed10,000 rpm
sub spindle tooling
back-working platen positions8
max drill speed capacityER16
power driven tool (pdt) positions8 (er16)
max (pdt) speed8,000 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 SR-20RII - Dimensions

More information

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