FLENDER Standard Couplings Torsionally Rigid All-Steel Couplings — ARPEX ARW-4/-6 Series © Siemens AG 2015 General information ■ Overview Coupling can be designed for use in potentially explosive atmospheres in accordance with the current ATEX Directive. ■ Benefits 6 ARPEX couplings of the ARW-4/-6 series are outstanding for their large angular misalignment capacity of 3°. They were spe- cially designed for drives where high misalignments which have to be compensated for by the coupling are to be expected. The intermediate spacer lengths are variable and are manufactured to customer specifications.
■ Application ARPEX couplings of the ARW-4/-6 series are used where large misalignment capacities are required. In the paper-making ma- chine industry, the ARW coupling has already proved itself as a maintenance-free alternative to the cardan shaft. Torques of be- tween 92 and 80000 Nm can be transmitted at a permitted an- gular misalignment of 3.0°. The intermediate spacer can be fit- ted radially without moving the connected units. Main areas of application for the ARW-4/-6 series: • Paper-making machines • Wind power systems • Traction drives ■ Design The design of an ARPEX NHN coupling of the ARW-4/-6 series is shown in the following illustration.
The plate packs are bolted al- ternately between the flanges of the coupling hubs and the inter- mediate spacer. Up to size 292-4 close-fitting bolts and from size 324-4 conical screw connections are used for fastening. Up to size 647-4 plate packs in rectangular design, from size 695-6 in hexagonal design are used. The intermediate spacers are vari- able in length and are manufactured specifically to customer specifications. Plate pack Hub Intermediate spacer Close-fitting bolt G_MD10_EN_00163a Collar nut Variants of the ARPEX coupling, ARW-4/-6 series 6/46 Siemens MD 10.1 · 2015