ST-38

Information

The ST-38 is the ideal sliding head solution for complex mill-turn parts within the 42mm diameter range. Star’s flagship model is packed with functionality that enables challenging parts to be processed in one set-up. Three 10 station turrets allow up to 70 tools to be loaded, each tool can be easily removed with Star’s unique clamping mechanism permitting fast set-up changes. The main spindle’s lower turret includes an independent Z3 axis. This axis allows two different features to be machined simultaneously (Z1 + Z3) using Star’s “super-position” control mode. An independent turret is utilized on the sub-spindle where components up to 150mm can be processed and front ejected. STAR MOTION CONTROL is also included to minimize idle time and thus further reduce cycle time.

WORKPIECE
DIAMETER		38mm / 42mm (OPT)
LENGTH		350mm
GEOMETRY
C AXIS		MAIN + SUB SPINDLE

Benefits

Standard machining diameter 38mm (42mm optional)
Z1 Stroke of 350mm
Twin turrets on main spindle for balanced turn-mill operations
Powerful 11.0 Kw main spindle
Z3 axis enables SUPER-POSITION control for increased overlap
YA2 axis on sub-spindle enables off-center pick up
Tool pre-setter included for easy tool set-up
STAR MOTION CONTROL to minimize idle time
Independent turret for sub-spindle for maximum overlap

Specification

MAIN SPINDLE SIDE
Number of axes	12
Main spindle (headstock)	Z1 / C1 AXIS
MAIN SPINDLE TURRETS	X1 / Y1 / X3 / Y3 / Z3 AXIS
MAX MACHINING DIAMETER	38 MM / 42 MM (OPTION)
HEADSTOCK STROKE)	350 MM
MAIN SPINDLE POWER	11.0 KW
MAIN SPINDLE SPEED	7,000 rpm
MAIN SPINDLE TOOLING
Turning tool	16 MM SQ + 20 MM SQ (CUT-OFF)
TURRET SLEEVE HOLDER CAPACITY	Ø 22 MM SLEEVES (ER16) + Ø 32 MM SLEEVES (ER20)
MAX DRIVEN TOOL (PDT) POWER	4.0 KW
MAX (PDT) SPEED	5,700 RPM

KINEMATIC DIAGRAM

SUB SPINDLE SIDE
Sub spindle	X2 / Y2 / Z2 / C2 / YA2 AXIS
Max. chucking diameter	38 MM / 42 MM (OPTION)
SUB SPINDLE POWER	7.5 KW
SUB SPINDLE SPEED	7,000 RPM
SUB SPINDLE TOOLING
TURNING TOOL	16 MM SQ
TURRET SLEEVE HOLDER CAPACITY	Ø 22 MM SLEEVES (ER16) + Ø 32 MM SLEEVES (ER20)
MAX DRIVEN TOOL (PDT) POWER	4.0 KW
MAX SPINDLE (PDT) SPEED	5,700 RPM