SIEMENS
FLENDER Standard Couplings
Torsionally Rigid All-Steel Couplings — ARPEX ARW-4/-6 Series
General information
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Siemens MD 10.1 · 2015
6
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Overview
Coupling can be designed for use in potentially explosive
atmospheres in accordance with the current ATEX Directive.
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Benefits
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.
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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
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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.
Variants of the ARPEX coupling, ARW-4/-6 series
Hub
Intermediate spacer
Close-fitting bolt
Plate pack
G_MD10_EN_00163a
Collar nut
© Siemens AG 2015