Standard design with encapsulated basic body made from high-strength aluminum material, with optimized torque. Driven by Ø 80-200 mm pneumatic cylinder. Power transmission via knee-lever mechanism, locked end position, pneumatic damping of both end positions. Drive shaft in needle-roller bearing with axial and radial bearing, maximum swivel angle = 135°, integrated end position sensing. Option: mechanic blocking system (BD) for emergency stop function