The rotary hydraulic cylinder, also known as the hydraulic rotary cylinder, is a tightly assembled accessory that uses hydraulic pressure to generate a very high torque in a small space. Despite the high power they can still be controlled with precision and ease. Rotary cylinders have been successfully used in almost all areas that require limited rotary motion and high torque.

In order to achieve effective and reliable function, high manufacturing precision is required. The inside of the tank is well protected from dust, dirt and moisture. This precision is accompanied by a robust and well-sealed housing that allows the cylinder to withstand operating pressures of up to 350 bar. Swing cylinders can also be used in very harsh conditions, underground and below 2300 meters above sea level. Oscillating cylinders are even used in the pharmaceutical and food processing industries that require high levels of cleanliness and hygiene.

Based on the small size of the rotary cylinder, the strength and reliability cannot be perceived. Powerful swing cylinders turn 20 Volkswagen Golf sedans from side to side. The design is based on a system with multiple helical gears. The linear motion of the piston is converted into rotary motion by multiple helical gears. The longer the linear motion of the piston, the greater the rotational motion.