Machining for cold drawn or hot rolled and drilled pipes.
Technology with  STGA-T:
• Dual combined Skiving and Roller Burnishing  STGA-T with movable skiving head
These tools are used for the internal finishing of cylinder tubes. The tool eliminates irregularities in
circular form such as rippling, that occur during the manufacturing process of hydraulic cylinders.
During the roller burnishing process the tool also creates a perfect surface.
The combined  tool STGA-T can achieve a diameter range of Ø 40 up to Ø 250 mm and a
length up to 12m. With the operating of  STGA-T the tool can achieve a diameter range of Ø 125 up to Ø250
and a maximum length of 4 m. Larger diameters on request.
The tool  STGA-T is equipped on the head with three viper plates and at the skiving head with three more
skiving knife plates. Tool STGA-T is equipped with 3 boring plates mounted to the boring head, as well
as six viper plates mounted to the skiving head.
The exchange of the plates is a quick and simple. STGA-T tools has a cutting efficiency of up to 3 mm in
diameter. STGA-T tool has a cutting ability of up to 8 mm. The excess material will be removed during
the boring process and the skiving head will remove the rest up to the set diameter and prepares the
optimal surface for the roller burnishing process.
Rollers placed in a cage on the tools circumference are forced into the cylinder´s inner wall thus smooth
the surface of the cylinder tubes. The forming process increases hardness and enhances, the wear and
the fatigue resistance of surface subjected to dynamic working load.

An environment friendly process in one step off ers cost reduction
• The tool system can be switched with pneumatics or hydraulic
• A switching cylinder is integrated in the tool
• Skiving knife and burnishing head will retrac automatically during reversing.
• Therefore it is possible to drive back the tool in fast traverse without
damaging the surface
Advantages:
• 90% less machining time compared with honing
• High dimensional and shape accuracy
• High cutting depth
• Easy Handling
• Quick replacement of spare parts through storage

Rolling, Walzen, Festwalzen, Glattwalzen, Feinwalen, Rolling finishing, Formwalzen, Form rolling, Size rolling,
Plastische Oberflachenverformung,Surface plastic deformation,Surface working
Innenkegelbearbeitung, glattwalzen, rollieren, rollwalzen, glatten,Rollierwerkzeuge
Optimierte Oberflachen durch Glatten und Verfestigen,
Glattwalzen, Glatten, Rollwalzen, Diamantglatten, Festwalzen, burnishing, roller burnishing, deep-rolling