During the production of seals, coolant gradually accumulates in the chip container of the suction.The newly developed CoolantReturn option, suitable for the SML machines (500e and 750e), enables a simple coolant return from the chip container back to the machine. The return pumping procedure will start automatically when activated, eliminating the need for manual emptying. CoolantReturn can be retrofitted easily and without great effort, it is easy to handle, guarantees lower coolant consumption and thus, a more efficient use of resources.