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CMS boasts the most extensive and versatile range of expanders on the market. This line represents another milestone in the technological development of machines produced by CMS - to carry out the delicate and very important tube expansion phase into the fin collars, therefore, ensuring an optimal heat transfer. Depending on the size of the heat exchanger and the quantity of the tubes to expand, we offer both vertical and horizontal expansion; for the latter, we are the leading manufacturer worldwide. All our machines can operate with an automatic or semi-automatic cycle, minimizing the presence of an operator. For small coil series and for manufacturing prototypes, we produce a ball expander (water-impulse) that is extremely user-friendly and requires virtually no setup – Model MHO.