Star CNC SR-38 Type 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 diameter Ø 38 mm (1-1/2in)
Max. headstock stroke With R.G.B. unit 320 mm (12-19/32in)
With R.M.G.B. unit 288 mm (11/32in) : OP
Tool 5 tools on the front (stationary type)+ 2 tools on the rear (X3 axis control)
5-Spindle sleeve holder Number of tools Front 5 tools
Rear 5 tools
Max. drilling capacity ø 23 mm (29/32in)
Max. tapping capacity M16XP2.0
Power driven att. Number of tools Cross milling: 4 tools
Cartridge type: At 2 position
Number of tools B-axis controlled power-driven tool unit: At 1 position (Front 3 tools + Rear 3 tools)
Max. drilling capability Ø 10 mm (25/64 in)
Max. tapping capability M8xP1.25
Spindle speed Max. 6,000min-1
Drive Motor 2.2 kw
Rapid feed rate 36m/min (X1,Y1,Z1,X2,Z2), 24m/min(Y2,X3)
Main spindle indexing angle C-axis control
Main spindle speed Max. 7,000min-1
Main spindle motor 7.5kw(continuous)/11kw (10min./25% ED)
Coolant tank capacity 253 L
Dimension (W x D x H) 2,740 x 1,315 x 2,120 mm
Weight 4,300 kg
Power consumption 15.9 KVA

Backworking Attachment

Max. chucking diameter Ø 38 mm (1-1/2in)
Max. length for front ejection 150 mm (5-7/8in)
Max. part projection length 70 mm (2-3/4in)
Back 8-spindle unit Number of tools 8 tools
Max. Drilling Capability Stationary tool: Ø 14 mm (35/64 in)
Power driven tool: 8tools
Max. Tapping Capability Stationary tool: M12xP1.75
Power driven tool: M6xP1.0
Power-driven att. spindle speed Max. 6,000min-1
Power-driven att. drive motor 1.0kw
Sub spindle indexing angle C-axis control
Sub spindle speed Max. 7,000min-1
Sub spindle motor 3.7kw(continuous)/5.5kw(10min/40%ED)