FLENDER Standard Couplings Flexible Couplings — N-EUPEX and N-EUPEX DS Series © Siemens AG 2015 General information ■ Design N-EUPEX and N-EUPEX DS couplings consist of two hub parts mounted on the machine shafts. The coupling parts are con- nected positively by means of elastomer flexibles. On the two- part variant, the elastomer flexibles can be changed only if one of the coupled machines is moved. On the three-part variants, the bolted cam ring can be released and moved to enable the flexible to be changed without moving the coupled machines.
Materials Cam parts, pocket parts, adapters and hubs Grey cast iron EN-GJL-250 Flexible materials • N-EUPEX series NBR standard type 80 ShoreA Flexible black with blue stripe -30 °C … +80 °C NBR electrically insulating 80 ShoreA Flexible green -30 °C … +80 °C NBR soft 65 ShoreA Flexible black with green stripe -30 °C … +80 °C NBR hard 90 ShoreA Flexible black with magenta stripe -30 °C … +80 °C NBR normal low-backlash 80 ShoreA Flexible black with yellow stripe -30 °C … +80 °C NBR soft low-backlash 65 ShoreA Flexible black with white stripe -30 °C … +80 °C NR for low temperature 80 ShoreA Flexible black with orange stripe -50 °C …
+50 °C HNBR high temperature 80 ShoreA Flexible black with red stripe -10 °C … +100 °C • N-EUPEX DS series NBR compound flexibles for sizes 66 … 272 80/90 ShoreA 2 components Flexible black -30 °C … +80 °C 7 NBR hard for sizes 305 ... 556 90 ShoreA Flexible black -30 °C … +80 °C PU elastomer flexibles in special design on request. PU electrically insulating 95 ShoreA Flexible blue -30 °C … +50 °C Low-temperature application The technical data and article numbers do not include the flexi- ble variants NBR low-backlash, HNBR high temperature and NR low temperature and the DS flexibles polyurethane electri- cally insulating. 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. Technical data, prices and article numbers on request.
Brake disks EN-GJS-400 spheroidal graphite cast iron or S355J2G3 steel Brake drums Grey cast iron EN-GJL-250 Types of N-EUPEX pin coupling A Fail-safe, 3-part B Fail-safe, 2-part D Fail-safe, 3-part, flange variant E Fail-safe, 2-part, flange variant H Fail-safe, with adapter O Fail-safe, 2-part, with brake drum P Fail-safe, 3-part, with brake drum EBD Fail-safe, 2-part, with brake disk DBD Fail-safe, 3-part, with brake disk DBDR Fail-safe, 3-part, with brake disk, brake disk radially dismountable ADS Non-fail-safe, 3-part BDS Non-fail-safe, 2-part HDS Non-fail-safe, with adapter Types of N-EUPEX pin coupling on request AT Fail-safe, 3-part, with Taper clamping bush BT Fail-safe, 2-part, with Taper clamping bush G Fail-safe, 2-part, with intermediate shaft F Fail-safe, 3-part, with intermediate shaft K Fail-safe, 3-part, with brake drum to customer's requirement L Fail-safe, 2-part, with brake drum to customer's requirement M Fail-safe, 2-part, with flange dimensions to SAE J620d Further application-related coupling types are available.
Dimension sheets for and information on these are available on request. 7/4 Siemens MD 10.1 · 2015 Material/description Hardness Identification Ambient temperature Material/description Hardness Identification Ambient temperature Type Description Type Description