Star CNC SR-38 Type A/B
Category: Star CNC


The SR-38 Type B sliding head lathe provides maximum functionality and capacity within a compact footprint. This model can easily be switched between guide bush mode (Swiss type) and non-guide bush modes with the ability to process raw material up to 42mm (in NGB mode). The independent X3 slide enables balanced cutting on the main spindle for maximum metal removal.

Fanuc’s high specification 31i-B5 control delivers full five axis capability enabling highly complex components to be processed. The Type B’s tilting B-axis tool post includes three front working and 3 counter-face tool stations for angular work on the sub-spindle.

The powerful sub-spindle with independent 8 station platen increases overlapped machining possibilities. The Y2 axis on the sub-spindle platen allows both cross working and front facing power tools to be mounted in any station.


  • Standard machining diameter 38mm (42mm NGB mode)
  • Z1 Stroke of 320mm in Swiss mode (Guide Bush)
  • Switchable between guide bush and non-guide bush modes
  • Programmable B axis for angular machining on both spindles
  • Independent X3 slide for balanced turning operations (main spindle)
  • Hydraulic actuator (main spindle) for maximum gripping force
  • Built-in type main and sub-spindle for improved indexing accuracy
  • STAR MOTION CONTROL to minimize idle time
  • 8 Station sub-spindle platen for maximum overlapping




Standard Machine Specs

Max. machining diameterØ 38 mm (1-1/2in)
Max. headstock strokeWith R.G.B. unit320 mm (12-19/32in)
With R.M.G.B. unit 288 mm (11/32in) : OP
Tool5 tools on the front (stationary type)+ 2 tools on the rear (X3 axis control)
5-Spindle sleeve holderNumber of toolsFront 5 tools
Rear 5 tools
Max. drilling capacityø 23 mm (29/32in)
Max. tapping capacityM16XP2.0
Power driven att.Number of toolsCross milling: 4 tools
Cartridge type: At 2 position
Number of tools (type A)Angle adjustable power-driven tool: At 1 position (Front 3 tools + Rear 3 tools)
Number of tools (type B)B-axis controlled power-driven tool unit: At 1 position (Front 3 tools + Rear 3 tools)
Max. drilling capabilityØ 10 mm (25/64 in)
Max. tapping capabilityM8xP1.25
Spindle speedMax. 6,000min-1
Drive Motor2.2 kw
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)/11kw (10min./25% ED)
Coolant tank capacity253 L
Dimension (W x D x H)2,740 x 1,315 x 2,120 mm
Weight4,300 kg
Power consumption15.9 KVA

Backworking Attachment

Max. chucking diameterØ 38 mm (1-1/2in)
Max. length for front ejection150 mm (5-7/8in)
Max. part projection length70 mm (2-3/4in)
Back 8-spindle unitNumber of tools8 tools
Max. Drilling Capability Stationary tool: Ø 14 mm (35/64 in)
Power driven tool: 8tools
Max. Tapping CapabilityStationary tool: M12xP1.75
Power driven tool: M6xP1.0
Power-driven att. spindle speedMax. 6,000min-1
Power-driven att. drive motor1.0kw
Sub spindle indexing angleC-axis control
Sub spindle speedMax. 7,000min-1
Sub spindle motor3.7kw(continuous)/5.5kw(10min/40%ED)