Hydrodynamic or hydraulic couplings operate on the Föttinger principle. The transmission is carried out through a fluid (oil) that rotates inside the coupling and is driven radially through opposing internal vanes that equalize their speed when reaching their nominal operating conditions.

• FLUDEX: available in 16 types and 16 sizes, are ideal couplings for applications requiring soft starts, given their ability to limit torque during full-load operation. They are also ideal for shock absorption and offer minimal slippage at rated load.