Star CNC Swiss Type Automatic Lathe
ST-20

Three turrets allows ultra high speed and flexible machining of complicated components.

• Simultaneous machining such as turning, milling etc. achieved by opposed twin turret design tool post dramatically reduces the machining time.
• Independent machining of front and rear ends by backworking turret reduces the cycle time yet further.
• STAR Motion Control System is a unique control technology which minimizes non-cutting time.

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Description

Tool PostTooling 
①Turning toolmax.3 tools/station
(□12mm)
Front-end working toolmax.3 tools/station
Rear-end working toolmax.3 tools/station
Power-driven toolmax.2 tools/station
②Turning toolmax.3 tools/station
(□12mm)
Rear-end working toolmax.3 tools/station
Power-driven toolmax.2 tools/station

Specifications

ItemST-20
Max.machining diameterø 20mm (25/32in)
Max.headstock strokeStandard350mm (13-25/32in)
R.M.G.B.unit317mm (12-31/64in)
Front working turret tool postFront8 stations turret tool post
Rear8 stations turret tool post
Number of turning toolsmax.3 tool/station (□12mm)
Sleeve holderNumber of toolsmax.3 tools/station
Max.drilling capabilityø 14mm (35/64in)
Max.tapping capabilityM12 × P1.75
Power-driven att.Number of toolsmax.2 tools/station
Max.drilling capabilityø 10mm (25/64in)
Max.tapping capabilityM8 × P1.25
Spindle speedmax.5,750min-1
Drive motor2.5kw
Rapid feed rate30m/min(X1,X2,X3,Z1,Z2,Z3)
15m/min(Y1,Y2,Y3)
3.9m/min(YA2)
Main spindle indexing angleC-axis control
Main spindle speedmax.10,000min-1
Main spindle motor3.7kw (Continuous) / 5.5kw (10min/60%ED)
Dimensions (W×D×H)2,988 × 1,720 × 1,845mm
Weight4,850kg
Power consumption8.5KVA

Backworking Attachment

ItemST-20
Max.chucking diameterø 20mm (25/32in)
Max. length for front ejection150mm (5-7/8in)
Max.work projection length75mm (2-61/64in)
Back working turret tool post8 stations turret tool post
Number of turning toolsmax.3 tool/station (□12mm)
Sleeve holderNumber of toolsmax.3 tools/station
Max.drilling capabilityø 14mm (35/64in)
Max.tapping capabilityM12 × P1.75
Power-driven att.Number of toolsmax.2 tools/station
Max.drilling capabilityø 10mm (25/64in)
Max.tapping capabilityM8 × P1.25
Sub spindle indexing angleC-axis control
Sub spindle speedmax.10,000min-1
Sub spindle motor3.7kw (Continuous) / 5.5kw (10min./60%ED)

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