ARPEX^® couplings of the ARW-4/-6 series are outstanding for their large angular misalignment capacity of 3°.

Benefits
These mechanical power transmission couplings were specially 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 high misalignment capacities are required. In the papermaking machine industry, the ARW coupling has already proved itself as a maintenance-free alternative to the cardan shaft. Torques of between 92 and 80,000 Nm can be transmitted at a permitted angular misalignment of 3.0°. The intermediate spacer can be fitted 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 and configurations
The design of an ARPEX NHN coupling of the ARW-4/-6 series is shown in the following illustration. The plate packs are bolted alternately between the flanges of the coupling hubs and the intermediate 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 variable in length and are manufactured specifically to customer specifications.
The coupling parts of the ARPEX ARW-4/-6 series with the exception of H spacers are machined on all sides. These are delivered with unmachined, primed spacer tube.

Link to full technical specification catalogue

N-ARPEX^® couplings:

Benefits
N-ARPEX^® couplings of the ARN-6/-8/-10 series are outstanding for their application-optimized construction.
The NEN, BEB, MCECM, MFEFM series meet the requirement of API 610. Couplings in accordance with API 671 are also possible. For speeds of over 1,800 rpm the five-part version with pre-assembled intermediate unit is used.
A special catching device acts to secure the intermediate spacer in the event of plate breakage.

Application of the N-ARPEX couplings in potentially explosive atmospheres in accordance with the current ATEX Directive are available.

Application
N-ARPEX couplings of the ARN-6/-8/-10 series are used wherever reliable torque transmission is called for, even in cases of often unavoidable shaft misalignment. They are universally applicable over a temperature range of from -50°C (as low as -60°C on request) up to +280°C, are torsionally rigid, free of torsional backlash and enable quiet running at a constant angular velocity. They are wear-free and maintenance-free and, if correctly fitted, can be expected to have an unlimited service life.

Special consideration is given for use in pump and compressor drives. For this type of application are couplings with standardised intermediate spacer lengths from stock (see following tables).

Main areas of application for the ARN-6/-8-/10 series:
» Pumps
» Fans
» Compressors
» Generator and turbine drives
» Axial and radial blowers
» Paper-making machines and printing machines
» Mixers, stirrers
» Extruders
» Lifting and traversing gears
» Marine drive
» Water screw drives

Link to full technical specification catalogue

The team of friendly, highly qualified and experienced engineers at jbj Techniques Limited are here to assist in the correct specification of mechanical power transmission and fluid power components. Telephone: +44 (0)1737 767493 or email info@jbj.co.uk