2 #DriveLineHarmony Rupex Series Introduction Torsionally Flexible Couplings » Hubs: Types RWN and RWB made of grey cast iron EN-GJL-250. Material/description Hardness Marking Ambient temperature Types RWS and RBS made of steel. » Flange: Types RFN, RFS made of steel. » Pins: Material steel 42CrMo4, surface fine-machined. » Brake disks: Type RWB made of EN-GJS-400 spheroidal graphite cast iron. Type RBS made of steel. » Brake drums: Type RWB made of EN-GJL-250 grey cast iron. Materials Type RBS made of steel. Buffer material NBR electrically insulating 80 ShoreA Element green -30 °C … +80 °C NBR soft 65 ShoreA Element black with green dot -30 °C … +80 °C NBR hard 90 ShoreA Element black with magenta dot -30 °C … +80 °C HNBR high temperature 80 ShoreA Element black with red dot -10 °C … +100 °C NR for low temperature 80 ShoreA Element black with white dot -50 °C … +50 °C NBR standard type 80 ShoreA Element black -30 °C … +80 °C RBS Coupling made of steel with brake drum or brake disk Type Description RWN Coupling made of grey cast iron All Coupling with pretensioned elements Coupling with lengthened pins and spacer sleeves RUPEX pin and bush coupling types Type Description RWS Coupling made of steel RWB Coupling made of grey cast iron with brake drum or brake disk RFS Coupling made of steel in flange-shaft variant RUPEX pin and bush coupling types on request RFN Coupling made of grey cast iron in flange-shaft variant RKS Coupling for engaging/disengaging during standstill Coupling with axial backlash limitation RWNH, RWSH Coupling with extension piece Further application-related coupling types are available. RBM Coupling with lengthened pins for sliding rotor motors Dimension sheets for and information on these are available on request. RAK Coupling combination RUPEX with ARPEX all-steel membrane coupling www.jbj.co.uk/couplings.html#flender
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