Star CNC Swiss Type Automatic Lathe
SR38 Type B

Complex machining for large diameter workpieces now aim for higher functionality,productivity and accuracy.

A balance-cut function by X1/X3 axis simultaneous control for high accuracy and high efficiency.
This machine employs a power-driven tool unit with B-axis control function.
The guide bush and non-guide bush are interchangeable. The non-guide bush type incorporates a spindle sleeve slide guideway structure for higher spindle rigidity.



Tool PostTooling 
Turning tool7 tools
working tool
5 tools
working tool
5 tools
Power-driven tool4 tools
Cartridge type2Pos.
Adjusutable angle
power-driven tool
1 Pos.
(Front 3 tools
+Rear 3 tools)
Power-driven tool
with B-axis control
1 Pos.
(Front 3 tools
+Rear 3 tools)
Rear-end working tool8 tools
Stationary toolmax.8 tools
Power-driven toolmax.8 tools


Max.machining diameterø38mm (1-1/2in)
Max.headstock strokeStandard320mm (12-19/32in)
R.M.G.B.unit288mm (11-11/32in)
N.G.B.type95mm (3-47/64in)
Number of turning toolsFront5 tools(□20mm×1 tool+□16mm×4 tools)
Rear2 tools(□16mm)
5-Spindle sleeve holderNumber of toolsFront : 5 tools
Rear : 5 tools
Max.drilling capabilityø23mm (29/32in)
Max.tapping capabilityM16 × P2
Power-driven att.Number of toolsCross milling : 4 tools
Cartridge type : At 2 position
Number of tools [typeA]Adjustable angle power-driven tool :
At 1 position(Front 3 tools + Rear 3 tools)
Number of tools [typeB]Power-driven tool with B-axis :
At 1 position(Front 3 tools + Rear 3 tools)
Max.drilling capabilityø10mm (25/64in)
Max.tapping capabilityM8 × P1.25
Spindle speedmax. 6,000min-1
Drive motor2.2kw(Continuous) / 4.0kw(5min./30%ED)
Rapid feed rate36m/min(X1,Y1,Z1,X2,Z2) , 24m/min(Y2,X3)
Main spindle indexing angleC-axis control
Main spindle speedmax.7,000min-1
Main spindle motor7.5kw(Continuous) / 11.0kw(10min./25%ED)
Dimensions(W×D×H)2,740 × 1,315 × 2,120mm
Power consumption15.9KVA

Backworking Attachment

Max.chucking diameterø38mm (1-1/2in)
Max.length for front ejection150mm (5-7/8in) projection length70mm (2/3/4in)
8-spindle backworking unitNumber of tools8 tools
Max.drilling capabilityStationary toolø14mm (35/64in)
Power-driven att.ø8mm (5/16in)
Max.tapping capabilityStationary toolM12 × P1.75
Power-driven att.M6 × P1.0
Sub spindle indexing angleC-axis control
Sub spindle speedmax.7,000min-1
Sub spindle motor3.7kw(Continuous) / 5.5kw(10min./40%ED)