FLENDER Standard Couplings Flexible Couplings — N-EUPEX and N-EUPEX DS Series © Siemens AG 2015 General information ■ Overview N-EUPEX as overload-holding, fail-safe series N-EUPEX DS as overload-shedding, non-fail-safe series N-EUPEX and N-EUPEX DS pin couplings connect machines. They compensate for shaft misalignment, generating only low restorative forces. N-EUPEX couplings are overload-holding. By contrast, the N-EUPEX DS series is designed so that overload or advanced wear causes irreparable damage to the elastomer flexibles. The metal parts of N-EUPEX DS couplings can then rotate freely against one another without contact.
The torque is conducted through elastomer flexibles, so the cou- pling has typically flexible rubber properties. 7 Elastomer flexible of the N-EUPEX series Elastomer flexible of the N-EUPEX DS series The flexibles of the N-EUPEX coupling are subjected to com- pression. If the flexibles are irreparably damaged, the hub parts come into contact with metal. This "emergency operation capa- bility" is required, e.g., in the case of fire pump drives. The flexibles of the N-EUPEX DS series are subjected to com- pression and bending forces. If the flexibles are irreparably damaged, the metal parts turn against one another without con- tact, and the power transmission is separated.
Fitting new flexi- bles will make the coupling once more usable. The capacity of the N-EUPEX DS series to shed overloads is especially in demand for highly sensitive machines. N - E U P E X G_MD10_XX_00068 G_MD10_XX_00069 N - E U P E X - D S 7/2 Siemens MD 10.1 · 2015