www.jbj.co.uk/couplings.html#flender 2 #DriveLineHarmony Elastomer element of the N-EUPEX series The elements of the N-EUPEX coupling are subjected to compression. If the elements are irreparably damaged, the hub parts come into contact with metal. This "emergency operation capability" is required, e.g., in the case of fire pump drives. N-Eupex Series Introduction Torsionally Flexible Couplings NEUPEX N- - EUPEX DS Elastomer flexible of the N-EUPEX DS series The elements of the N-EUPEX DS series are subjected to compression and bending forces. If the elements are irreparably damaged, the metal parts turn against one another without contact, and the power transmission is separated. Fitting new elements will make the coupling usable again. The capacity of the N-EUPEXDS series to shed overloads is especially in demand for highly sensitive machines. Materials » Adapters and hubs: Grey cast iron EN-GJL-250 » Brake disks: EN-GJS-400 spheroidal graphite cast iron or S355J2G3 steel » Brake drums: Grey cast iron EN-GJL-250 » Low-temperature application: Shock loads in the drive caused by e.g. starting of drives with large masses to be accelerated (e.g. in fan drives) result in high component loads, particularly at low temperatures. For such applications a particularly robust coupling series must be selected. Of the flexible couplings, the RUPEX pin-and-bush coupling is especially suited for this. Flexiblematerials Material/description Hardness Marking Ambient temperature N-EUPEX series NBR standard type 80 ShoreA Element, black with blue stripe -30 °C…+80 °C NBR electrically insulating 80 ShoreA Element, green -30 °C…+80 °C NBR soft 65 ShoreA Element, black with green stripe -30 °C…+80 °C NBR hard 90 ShoreA Element, black withmagenta stripe -30 °C…+80 °C NBR normal low-backlash 80 ShoreA Element, black with yellow stripe -30 °C…+80 °C NBR soft low-backlash 65 ShoreA Element, black with white stripe -30 °C…+80 °C NR for low temperature 80 ShoreA Element, black with orange stripe -50 °C…+50 °C HNBR high temperature 80 ShoreA Element, black with red stripe -10 °C…+100 °C N-EUPEXDS series NBR hard 90 ShoreA Element, black -30 °C…+80 °C Overload holding, fail-safe series Overload shedding, non-fail-safe series
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