Starrag Starrag STC 1250

$2,000,000 - $3,500,000 Updated 2026-03-19

Key Specifications

X Travel

1,500 mm (59.1 in)

Y Travel

1,250 mm (49.2 in)

Z Travel

1,000 mm (39.4 in)

Max Spindle

18,000 RPM

Spindle Taper

HSK-A100 / HSK-A63 / ISO 50

Tool Capacity

60 - 510 tools

Overview

The Starrag STC 1250 is a high-performance simultaneous 5-axis machining center from the flagship STC series, engineered for aggressive material removal in titanium, Inconel, and other difficult aerospace alloys. The 1250 designation refers to the 1,250 mm pallet size, positioning it in the medium-large workpiece segment for aerospace structural components, turbine casings, and landing gear fittings.

The STC 1250 delivers spindle power up to 120 kW (161 HP) through motor spindle configurations accepting HSK-A100, HSK-A63, or ISO 50 tooling interfaces, with speeds reaching 18,000 RPM. The machine achieves material removal rates exceeding 800 cm3/min in titanium. Axis travels are approximately 1,500 mm (59.1 in) in X, 1,250 mm (49.2 in) in Y, and 1,000 mm (39.4 in) in Z.

The STC series modular head concept is central to versatility. Compact, stiff milling heads in either 1D (nodding head) or 2D (A/C-axis fork head) configurations enable shorter tool lengths for improved cutting stability. Tool magazines range from 60 to 510 tools, and high-pressure coolant delivery up to 150 bar ensures effective thermal management during sustained roughing.

The Siemens SINUMERIK 840D sl control manages full 5-axis simultaneous interpolation. Available in both 5-axis and 6-axis configurations, with the 6-axis version adding integrated turning. New machines price between $2,000,000 and $3,500,000.

Full Specifications

Parameter	Value
Pallet Size	1,250 mm (49.2 in)
X-Axis Travel	1,500 mm (59.1 in)
Y-Axis Travel	1,250 mm (49.2 in)
Z-Axis Travel	1,000 mm (39.4 in)
Max Spindle Speed	18,000 RPM
Spindle Taper	HSK-A100 / HSK-A63 / ISO 50
Spindle Motor Power	120 kW (161 HP)
Material Removal Rate Titanium	>800 cm3/min
Coolant Pressure	Up to 150 bar
Tool Capacity	60 - 510 tools
Head Configuration	1D (nodding) or 2D (A/C fork head)
Number Of Axes	5 (6-axis optional with turning)
CNC Control	Siemens SINUMERIK 840D sl
Spindle Orientation	Horizontal

Specifications sourced from starrag.com — verified 2026-03-28

Strengths & Limitations

Strengths

120 kW spindle power with >800 cm3/min titanium removal rate delivers best-in-class productivity for aerospace structural machining
1,250 mm pallet accommodates medium-to-large turbine casings, structural frames, and landing gear components
Modular head concept (1D or 2D) allows configuration optimization for specific part families
Tool magazine capacity up to 510 tools eliminates tool change interruptions on complex aerospace programs
150 bar high-pressure coolant maintains chip evacuation during sustained titanium and Inconel roughing
Optional 6-axis configuration with turning enables complete machining of rotation-symmetric components

Limitations

Price of $2M-$3.5M represents one of the highest capital commitments in the 5-axis segment
18,000 RPM maximum spindle speed in HSK-A100 configuration may limit high-speed aluminum machining
Large footprint and heavy machine weight require dedicated foundation engineering
Specialized aerospace focus means narrow resale market compared to general-purpose HMCs

Best For

Aerospace Tier 1 suppliers producing titanium and Inconel turbine casings and structural frames Landing gear manufacturers machining large high-strength steel and titanium forgings Power generation turbine builders producing gas turbine casings in heat-resistant superalloys Defense contractors machining large propulsion and airframe components Aerospace OEMs seeking maximum titanium removal rates in a proven platform

Frequently Asked Questions

01 What is the difference between the STC 1250 and STC 1000?

The STC 1250 has a larger 1,250 mm pallet (vs 1,000 mm) and proportionally larger axis travels. Both share the same spindle power range (up to 120 kW) and modular head architecture.

02 What industries use the Starrag STC 1250?

Primarily aerospace (turbine engine casings, structural components, landing gear), power generation (gas turbine housings), and defense (propulsion and structural components).

03 Can the STC 1250 be automated with pallet systems?

Yes, the horizontal configuration with standardized pallet interface is designed for FMS integration with pallet pool systems from Starrag, Fastems, and Liebherr.

04 What tooling interface is recommended for titanium machining?

HSK-A100 is recommended for aggressive titanium roughing due to superior clamping rigidity. HSK-A63 is suitable for lighter finishing and aluminum machining.