A group of companies with three world-leading business areas since its establishment in 1860. This is PTG –– a group of companies specializing in the manufacture of highly precise rotor milling machines, rotor grinding machines, and friction stir welding machines, as well as the design and manufacture of various precision screw parts.

Nanometer-level resolution: Linear axis resolution up to 0.03125 nm ensures ultimate surface quality.

Motion accuracy: Linear axes (X, Z axes) have a travel of 300 mm, with a straightness deviation of less than +/- 0.2 μm over the entire travel.

Natural granite base: Utilizes natural granite as the base, combined with a self-balancing pneumatic isolation system (active isolation optional) to ensure thermal stability and dynamic rigidity during the machining process.