Our highly qualified workforce and over 55 years of experience guarantee top quality and precision.
Salvatore Villani
Supervisor quality control large parts
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Salvatore Villani

Mechanical processing

STI Group uses the appropriate surface treatment for components so that they can perform to the most demanding functional requirements and best cost-efficiency. The company's modern machinery, which includes turning, milling, grinding, blasting and polishing equipment, as well as its highly experienced staff, are the customers' guarantee of compliance with the specified geometric accuracy and degrees of roughness.

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Turning, Drilling, Milling

Maximum component size

Ø up to 650 mm, length up to 3,000 mm, weight up to 3,800 kg

 

Precision

Complete high-precision machining

 

Geometry

Freely definable curves

 

Locations

China, Switzerland

Cylindrical grinding

Maximum component size

Ø up to 6,000 mm, length up to 27,000 mm, weight up to 64,000 kg

 

Precision

Roughness Rmax < 0.1 μm, concentricity < 1 μm, cylindricity < 2 μm

 

Geometry

Cylindrical, concave, convex, freely definable curves, at operating conditions (temperature) 

 

Locations

China, Germany, France, Switzerland

 

Flat grinding

Maximum component size

Length up to 2,200 mm, width up to 700 mm, height up to 890 mm, weight up to 4,000 kg

 

Precision

Roughness Rz < 0.8 μm, evenness < 0.002 mm, parallelism < 0.004 mm

 

Geometry

Deep grinding, profile and flat grinding, CNC-controlled dividing head

 

Locations

China, Switzerland

Polishing

Maximum component size

Diameter up to 2,800 mm

Length up to 6,000 mm

Weight up to 25 tonnes

 

Precision

Roughness Rmax < 0.1 μm

Concentricity       < 1 μm

Cylindricity   < 2 μm

 

Geometry

Special curves, concave and convex +2 mm  /  -2 mm

 

Locations

Germany, Switzerland

Blasting

Maximum component size

Diameter: up to 6,000 mm

Lengths:        up to 11,000 mm

Weight: up to 60 tonnes

 

Precision

Shot blasting: Rz up to 80 μm

Sandblasting:  Rz up to 50 μm

Glass bead blasting on request: Rz up to 40 μm

 

Locations

Germany, Switzerland