![[Translate to English:] SR-20J II](/fileadmin/_processed_/f/5/csm_star_sr20jii_42c3db0f0c.png)
![[Translate to English:] Kinematik SR-20J II](/fileadmin/_processed_/5/7/csm_star_sr20jii_kinematik_e99932a185.png)
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-station drilling unit incl. sleeves (front and rear side)
- 5 + α power-driven tools for cross machining on tool post
- 2 deep hole drilling stations
- 4 + α power-driven tools including sleeves for backworking (type A)
- 8 + α power-driven tools including sleeves for backworking (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).
![[Translate to English:] SR-20J II Type A/B](/fileadmin/_processed_/2/f/csm_star_srjii_vorteile_847692c7ef.png)
Advantages
- FANUC 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
Specifications
| 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 |
![[Translate to English:] Maße der SR-20J II](/fileadmin/_processed_/4/d/csm_star_sr20jii_grafik_5c516e838e.png)
| Main spindle side | SR-20J II type A | SR-20J II type B |
|---|---|---|
| Number of axes | 4 | 4 |
| Axes ain spindle (headstock) | Z1 / C1 | Z1 / C1 |
| Axes tool post | X1 / Y1 | X1 / Y1 |
| 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 |
| Axes sub spindle | X2 / Z2 / C2 | X2 / Z2 / C2 |
| Vertical axis for backworking | Y2 | Y2 |
| 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 |
| Backworking tools | ||
| 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
- FANUC 32i-B control system 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 including sleeves for backworking (type A)
- 8 + α power-driven tools including sleeves for backworking (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
Machining examples
![[Translate to English:] Bohrbearbeitung](/fileadmin/_processed_/5/6/csm_star_sr20jii_bohrbearbeitung_f9ba157422.jpg "<strong>Drilling operations</strong><br>
Extended machining capability through the new 5-spindle drilling unit. A further drilling station adds flexibility to the front machining.")
![[Translate to English:] Querbearbeitung](/fileadmin/_processed_/2/6/csm_star_sr20jii_querbearbeitung_1379d98333.jpg "<strong>Cross machining</strong><br>
Cross machining and milling. On the SR-20JII the cross machining station is equipped with the ER20 chuck size for the first time. This expands the possibility for larger drills, cutters and saws. Detailed cross machining with the C axis meets the high requirements for precision turned parts.")
![[Translate to English:] Angetriebene Werkzeuge](/fileadmin/_processed_/e/1/csm_star_sr20jii_angetriebene_werkzeuge_599a3bf3bc.jpg "<strong>Power-driven tools</strong><br>
Numerous power-driven tools are available, e.g. thread whirling units or milling units. Off-centre machining is possible with a selection of front drilling units at any time.")
![[Translate to English:] Rückseitige Bearbeitung bei type A](/fileadmin/_processed_/a/6/csm_star_sr20jii_rueckseitige_bearbeitung_a_02bc3c89ec.jpg "<strong>Backworking with type A</strong><br>
Fully independent backworking enables flexible, overlapped machining. The part produced on the main spindle can be finished on the backworking side on 4 tool stations, e.g. with power-driven units.")
![[Translate to English:] Rückseitige Bearbeitung bei type B](/fileadmin/_processed_/d/a/csm_star_sr20jii_rueckseitige_bearbeitung_b_6bad2f1b73.jpg "<strong> Backworking with type B </strong> <br>
Fully independent backworking with additional vertical axis is available. This simplifies the adjustment of the centre height of the turning tools and also enables flexible cross machining.")
![[Translate to English:] Angetriebene Werkzeuge Rückseite](/fileadmin/_processed_/1/d/csm_star_sr20jii_angetriebene_werkzeuge_rueckseite_9bfcaba32d.jpg "<strong> Power-driven tools on the rear side </strong><br>
Various power-driven tools are available. Cross drilling, cross milling, polygon machining, and cylindrical, polar and helical interpolation are all possible on the sub spindle.")
Selection from our
range of tools
![[Translate to English:] 661-59](/fileadmin/_processed_/0/d/csm_star_6661-59_88eb527f33.png)
![[Translate to English:] OM1-55](/fileadmin/_processed_/9/1/csm_star_OM1_55_bfadccaa2b.png)
![[Translate to English:] 541-54](/fileadmin/_processed_/f/a/csm_star_541_54_142846f773.png)
![[Translate to English:] 331-50](/fileadmin/_processed_/3/1/csm_star_331_50_ea311eff73.png)
![[Translate to English:] 681-72](/fileadmin/_processed_/3/c/csm_star_681_72_4f0c9b6828.png)
![[Translate to English:] OT1-91](/fileadmin/_processed_/2/0/csm_star_OT1_91_6be7290be0.png)
![[Translate to English:] 101-18](/fileadmin/_processed_/4/4/csm_star_101_18_45ed476ec2.png)
![[Translate to English:] OR1-23](/fileadmin/_processed_/3/b/csm_star_OR1_23_1a576c4c0b.png)
![[Translate to English:] 101-08](/fileadmin/_processed_/a/8/csm_star_101_08_b8345d6c17.png)
![[Translate to English:] 7.076.370](/fileadmin/_processed_/b/5/csm_star_7_076_370_4b7f02a743.png)
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
Müller Products can easily be combined with and configured to your star* machine.
REQUEST quotation NOW
You will receive a quotation for a star* SR-20J II with a standard configuration.
Download
SR-20J II brochure
HFT Flyer
