SR-20J II

type A/B

Diameter 20 mm / 23 mm (option)
Headstock stroke 205 mm / 50 mm (fixed headstock lathe)
Machining possibilities

Kinematics & tools

  • 6-station tool holder on the tool post
  • 5 + α power-driven tools for cross machining on tool post
  • 5-station drilling unit incl. sleeves (front and rear side)
  • 2 deep hole drilling stations
  • 4 + α power-driven tools for backworking including sleeves (type A)
  • 8 + α power-driven tools for backworking including sleeves (type B)
  • 7 axes (type A) / 8 axes (type B)

SR

20J II


type A/B

THE UPGRADE

SR-20J II TYPE A/B

The SR-20J II type A/B upgrade impresses through the ability to convert the machine from a fixed to a sliding headstock lathe, a substantially more stable machine bed, and also considerably higher performance when machining with increased drive power. The spectrum has also been extended to include 5 drilling tools respectively on the front and rear side. For backworking, the type A machine is equipped with 4 stable tool stations and for type B with a Y2 axis and 8 tool stations (dovetail guide).

Advantages

  • CNC control FANUC series 32i-B, control system with handle
  • C axis control as standard on main and sub spindle
  • fully independent backworking with 8 stations
  • convertible from sliding headstock to fixed headstock lathe
  • movable control panel
  • 2 additional deep hole drilling stations
General information SR-20J II type A SR-20J II type B
Number of axes 7 8
Max. rapid traverse speed 35 m/min 35 m/min
Weight approx. 2,750 kg approx. 2,750 kg
Coolant tank capacity 202 litres 202 litres
Dimensions (L x W x H) approx. 2,250 × 1,200 × 1,700 mm approx. 2,250 × 1,200 × 1,700 mm

Main spindle side SR-20J II type A SR-20J II type B
Number of axes 4 4
Main spindle (headstock) Z1 / C1-axis Z1 / C1-axis
Tool post X1 / Y1-axis X1 / Y1-axis
Max. machining diameter 20 mm / 23 mm (option) 20 mm / 23 mm (option)
Max. headstock stroke (sliding/fixed headstock) 205 mm / 50 mm 205 mm / 50 mm
Max. main spindle drive power 3.7 kW 3.7 kW
Max. main spindle speed 10,000 1/min 10,000 1/min
Tools on the tool post    
Turning tools 6 tools (□ 12 mm) 6 tools (□ 12 mm)
Drilling tools (5-spindle drilling unit) 5 tools (ER16) 5 tools (ER16)
Cross machining tools 1 tool (ER20) / 4 tools (ER16) 1 tool (ER20) / 4 tools (ER16)
Max. cross machining drive power 3.0 kW 3.0 kW
Max. cross machining speed 8,000 rpm 8,000 rpm
Front drilling unit tools    
Sleeve Ø 22 mm Ø 22 mm
Max. drilling depth 115 mm 115 mm

Sub spindle side SR-20J II type A SR-20J II type B
Number of axes 3 4
Sub spindle X2 / Z2 / C2 axis X2 / Z2 / C2 axis
Vertical axis for backworking Y2 axis Y2 axis
Max. chucking diameter 20 mm / 23 mm (option) 20 mm / 23 mm (option)
Max. sub spindle drive power 3.7 kW 3.7 kW
Max. sub spindle speed 10,000 rpm 10,000 rpm
Tool stations 4 tools (4 power-driven) 8 tools (8 power-driven)
Max. backworking speed 8,000 rpm 8,000 rpm

Standard scope of delivery

  • CNC control FANUC series 32i-B with handle
  • C axis control as standard on main and sub spindle
  • synchronously driven guide bush unit
  • convertible from sliding headstock to fixed headstock lathe
  • 6-station tool holder on the tool post
  • 5 + α power-driven tools for cross machining on tool post
  • 5-station drilling unit incl. sleeves (front and rear side)
  • 2 deep hole drilling stations
  • 4 + α power-driven tools for backworking including sleeves (type A)
  • 8 + α power-driven tools for backworking including sleeves (type B)
  • broken cut-off tool detector
  • parts ejection detector
  • sub spindle for backworking
  • sub spindle air blow unit
  • parts receptacle
  • pneumatic unit with maintenance unit
  • sub spindle parts ejection detector
  • parts conveyor to remove the parts
  • oil lubrication system
  • separate coolant tank with level monitoring and coolant flow detector
  • bar feeder interface
  • levelling pads and adjustment screws
  • worklight
  • toolbox with special tools

  • metric input
  • tool nose radius compensation
  • constant cutting speed for main and sub spindle
  • multiple canned cycles
  • operating hours display
  • parts counter
  • automatic power supply cut-off function
  • interfaces to input and read data
  • program sequence controllable with handle
  • cylindrical interpolation
  • polar coordinate interpolation
  • polygon machining
  • helical interpolation
  • 3D coordinate conversion mode

  • bar feeding: bar feeder
  • chip disposal: chip conveyor
  • long parts ejector
  • beacon: acc. to customer requirements
  • high pressure unit: 50 to 300 bar
  • fire protection: small fire extinguishing system
  • complete filtration coolant
  • Tools in the internet at www.star-tools.eu

Metal cutting
innovation

Selection from our

range of tools

Your advantages

with star Micronics

  • Training
    STAR Micronics GmbH offers special training sessions for machine operators. You as customer can decide whether to have the training in our company or on your premises. The training is naturally exclusively for your personnel and specifically designed for your range of parts.
  • High pressure unit
    The machine can be retrofitted with high pressure units from 50 to 300 bar. In addition, other developments are available to you, such as programmable pressure control or complete filtration.
  • Cooling lubricants
    The machine can be run with oil or with aqueous emulsions. However, we recommend the use of oil as this is far more beneficial to the longevity of the machine.
  • Bar feeder
    All commonly available bar feeders (FMB/IEMCA/LNS) can be used with the machine. The software interface is included in the machine as standard.
  • Chip conveyor
    The machine can be fitted with a chip conveyor or a chip flushing system.
  • Peripherals
    Peripheral components such as parts separators, purchased coolant units (oil/emulsion), coolant filters, fire protection systems and TPM (tool process monitoring) can also be offered. A retrofit of peripheral components is always possible.
  • Service
    SSC star* Service Connect as 24/7 customer portal and online connectivity for your machines, tickets and service calls. A current overview can be called up at any time. In addition, you have access to the star* knowledge database

You will receive a quotation for a star* SR-20J II with a standard configuration.

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SR-20J II brochure

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SR-20J II brochure

HFT Flyer