FLENDER Standard Couplings Torsionally Rigid All-Steel Couplings — ARPEX ARF-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 ARPEX couplings of the ARF-6 series are extremely short and so suitable for drives with short shaft distances. They also serve as self-aligning couplings for axial, angular and radial misalign- ment. The hubs are available both as pure clamping hubs for smooth shafts and with parallel keyway for shafts with parallel key. The variant with slit clamping hubs enables the delivery of fully preassembled couplings.
This means that the entire cou- pling can be dismounted and fitted without moving the con- nected units. 6 ■ Application ARPEX couplings of the ARF-6 series are designed for minimum fitting spaces without having to sacrifice the advantages of the two-joint coupling. It is thus possible to compensate for both ax- ial and angular as well as radial misalignment. By using half- shell clamping hubs, the coupling can be radially freely dis- mounted. Power is transmitted via hexagon socket head cap screws and close-fitting bolts with nuts and ring plate packs in hexagonal design. Torques of between 120 and 6100 Nm can be transmitted at a permitted angular misalignment of 0.7°.
Main areas of application for the ARF-6 series: • Film stretching machines • Machines in the cellulose industry • Machines in confined fitting situations ■ Design The two plate packs form a unit with the adapter disk and are screwed together with close-fitting bolts and nuts at three points. The alternate connection of this intermediate unit with the flanges of the split coupling hubs is achieved by means of short hexagon socket head cap screws at further three points. The hubs are designed as axially slit clamping hubs with a half-shell. For larger bores these can be manufactured as jumbo hubs. Optionally, the hubs are also available without parallel keyway.
Hexagon socket head cap screw Split hub Hexagon socket head cap screw Plate pack unit Hexagon socket head cap screw G_MD10_EN_00166a Design of the ARPEX coupling, ARF series 6/51 Siemens MD 10.1 · 2015