Starrag STC Series

5 and 6 axis simultaneous performance cutting

Starrag STC Series

High performance simultaneous 5 and 6 axis machining center

The STC series has been designed to provide unrivalled economy in the machining of the most demanding structural parts, multi-blades and casings with long cycle times, and provide the customer with a whole host of practical options.
These machining centers have excellent static and dynamic properties as well as a tried and tested rotatable head, making them the benchmark for heavy chip removal in titanium and Inconel part for the aerospace and power generation industries.

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Applications

Titanium casing

30% more productive for metals like titanium or inconel

Titanium blisk

Reliable precision and unblemished surfaces for Ra < 0.6μm

Aluminium structural part

+87% Performance increase due to 120kW / 161hp spindle

Small landing gears

30% more productive for hard metals like titanium or inconel

Titanium structural part

Unrivalled material removal rates of > 800 cm3/min in Titanium

Big impeller

Customized solutions for open and closed impellers

Magnesium casings

Higher productivity due to optimum machine concept for every casing type

Vacuum chambers

Powerful 18,000 rpm spindle with unique HSK-A100 spindle optimized for deep cavities in aluminium

Spindles

Starrag offers comprehensive spindle know-how and for many years has successfully delivered more than 2000 units to the market.

As a customer you benefit from unmatched productivity thanks to highest MRR (Material removal rate) with Starrag motor spindles up to 120 kW and Starrag gear driven spindles up to 53 kW.

For hard to cut materials Starrag spindles achieve higher material removal rates through

Superior stiffness with short and sturdy spindles shafts
Superior collision contour through compact built up means shorter tools lengths
Superior torque characteristic adjusted for hard metal machining

Angle head

Angle head with automated tool change

For many applications, e. g. casings or gearboxes, angle heads are necessary to machine internal surfaces. Starrag provides the leading solution here.

The machines can be equipped with angle heads. Not only can an angle head be loaded fully automatically from the tool magazine into the spindle, but also can the tools be changed automatically into the angle head. That means that a multitude of different cutting tools can be used with the same angle head – setting a benchmark for flexibility.

STC 800

Maximum workpiece capacity

800 x 800 mm
(800 x 1000 mm)

2,000 kg
(2,500 kg)

STC 1000

Maximum workpiece capacity

800 x 800 mm
(800 x 1000 mm / 1000 x 1000 mm)

3,000 kg
(5,000 kg)

STC 1250

Maximum workpiece capacity

1000 x 1000 mm
(1000 x 1250 mm / 1250 x 1250 mm)

5000 kg

STC 1600

Maximum workpiece capacity

1250 x 1250 mm
(1250 x 1600 mm / 1600 x 1600 mm)

8000 kg

STC 1800

Maximum workpiece capacity

1250 x 1800 mm
(1600 x 1800 mm)

12'000 kg

Machine sizes

The modular design of the STCs allows selecting the optimal configuration for the specific application.

While in most cases the well established 1D nodding head is optimal, where as a 2D head (A- and C-axis combination) is beneficial for example for large structural aerospace components or large multi blade parts such as impellers.

Machine axis

To achieve highest material removal rates, it is decisive to have a balanced design without weakness. Here the extremely compact milling heads (1D or 2D head) are built stiff and accurate. In addition to the high stiffness, the compact milling head, means shorter tools can be used giving additional stability.

High performance simultaneous 5 axis mill turn center

STC 800 / S90 / S100

High performance simultaneous 5 axis machining center

STC 1000 / STC 1250 / STC 1600

High performance simultaneous 6 axis machining center

STC 1250 / STC 1600 / STC 1800

Surface quality

Some recent improvements introduced by Starrag:

Disturbance free drive concepts
Specific analysis of process stability
Control optimization for cutter path planning
Adaptive compensations
Model-based feed-forward control

All these result in a new quality of surface finish.

Tool handling

The STC machines are equipped with state-of-the-art tool magazines and tool changers manufactured by the Starrag Group.

With a range of tool magazines from 60 to 510 tools (HSK-A100 / ISO 50/ HSK-A63), the right solution can be selected for any application.

Starrag's chain and tower magazines offer the following advantages:

Fast and reliable design, tested in hundreds of machines.
Tool loading during machining process.
Wide variety of magazine sizes and options.

Process cooling (CO2-cooling)

One key factor to lowering your tooling costs and increasing your productivity is selecting the right cooling method.
All state-of-the-art through spindle cooling medias are available throughout the STC range.

Some recent improvements introduced by Starrag:

High pressure cooling for water-based coolants or oil (pressures up to 150 bar to get as close to the cutting zone as possible) through spindle air
Aerosol (minimum quantity lubrication)

Of course external cooling with coolant or CO2 is possible too. With these options, breakthroughs in tool life are achievable, giving your largest saving on your tooling costs.

Precision and process capability

In modern production, quality is an absolute must. For Starrag this means that reliable manufacturing must be possible in less than ideal conditions such as fluctuating temperatures or lack of warm-up phases. As the customer this is an opportunity to reduce costs by reducing the frequency of CMM measuring the finished parts. Additionally, energy costs for temperature stabilization of the shop and machine can be reduced.

Evolutionary step

Starrag also offers MT-hybrid versions of STC machining centres

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STC Series

5 and 6 axis simultaneous performance cutting

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