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In an increasingly price-driven market, it is common to find viscous clutches that appear similar but which, nevertheless, conceal significant differences in aspects such as the materials used, the manufacturing processes or the quality controls applied during production – factors that directly influence their performance and reliability, particularly in applications subject to high thermal loads and long operating hours.
Entirely developed and manufactured in Spain
At Cojali, the design and manufacture of viscous clutches takes place entirely in Spain, under quality control procedures that cover everything from the selection of components to the final inspection of each unit. This approach ensures product traceability and enables continuous monitoring of all the processes involved in its manufacture.
Components with high technical specifications
One of the most sensitive components within a viscous clutch is the bearing. Its correct operation determines both the durability of the assembly and its ability to operate reliably under demanding conditions. For this reason, Cojali Parts viscous clutches feature tailor-made bearings with specific internal tolerances, Viton seals, and greases formulated to withstand temperatures ranging from -40 °C to +200 °C.
Silicone fluid developed for application
The same care is taken with the silicone fluid used inside the clutch. Its formulation has been specifically developed for this type of application, ensuring adequate torque transmission and consistent performance throughout the component service life.
Smooth and efficient modulation
The operation of the cooling system also depends on the clutch ability to adjust the fan speed to the engine actual requirements. Progressive control helps to improve the system efficiency, reduce noise levels, lower fuel consumption and prevent unnecessary strain on the various associated components.
Individual check before delivery
Validation processes also play a key role. For this reason, all units undergo functional testing to ensure they are working correctly before their commercialisation. This level of control and the company’s confidence in its products are reflected in the recent upgrade of the warranty to up to 3 years for this range of components, a move that reinforces Cojali’s commitment to the reliability and durability of its solutions.
Specialised technical support
In addition to these checks, Cojali offers specialist technical support, which is designed to provide customers with advice and assistance both in selecting the right product and in resolving any issues that may arise.
In short, aspects such as product design, the choice of materials, manufacturing processes, final validation and after-sales support are factors that directly influence the performance of a viscous clutch throughout its service life. Cojali’s activities in the field of cooling systems are built upon these pillars, combining in-house development, industrial capacity and technological innovation. An approach that the company has maintained throughout its 35-year history and which continues to drive the evolution of its products.