N-EUPEX and N-EUPEX DS claw couplings connect machines, compensate for shaft misalignment, whilst generating only low restorative forces. The torque is transmitted through elastomer elements, giving the coupling typically flexible properties.

N-EUPEX couplings are overload-holding. By contrast, the N-EUPEX DS series is overload-shedding, designed so that overload or advanced wear causes irreparable damage to the elastomer elements. The metal parts of N-EUPEX DS couplings can then rotate freely against one another without contact.

Benefits
N-EUPEX flexible shaft couplings are designed on a modular principle and have a very simple construction. N-EUPEX types are made up of subassemblies to suit requirements. The couplings are assembled by simply fitting the coupling halves together. Wear is restricted to the elastomer elements, which must be replaced at the end of their service life.
Depending on type, the elastomer elements can be changed without moving the coupled machines.
The coupling parts are readily available from stock and are mostly finish-machined, i.e. with finished bore, keyway, set screw and balancing.
Please note that if the couplings are finished machined / bored and keyed in the jbj Techniques machine shop, the couplings will be supplied unbalanced, unless specifically requested.

Application
The N-EUPEX coupling is available as a catalogue standard in 23 sizes with a rated torque up to 85,000 Nm. The coupling is suitable for use at ambient temperatures of between -30°C and +80°C. By using alternative elastomer elements, the permissible ambient temperature range can be extended to between -50°C and +100°C. Frequently, the coupling is used to connect the motor to the gear unit input shaft. The coupling is suitable especially for drives with uniform to average dynamic loads.

Furthermore, N-EUPEX couplings can be used as add-on couplings, particularly on FLUDEX fluid couplings or ARPEX AKR safety couplings. In the case of drives with a diesel engine, N-EUPEX couplings are suitable for driven machines with a low mass moment of inertia.

Design and Configurations
N-EUPEX and N-EUPEX DS couplings consist of two hub parts mounted on the machine shafts. The coupling parts are connected positively by means of elastomer elements. On the two-part variant, the elastomer elements can be changed only if one of the coupled machines is moved. On the three-part variants, the bolted cam ring can be released and moved to enable the element to be changed without moving the coupled machines.

A new type, N-EUPEX DK, added to the modular principle of N-EUPEX with performance & bore capacity of all types increased.

Link to full technical specification catalogue

All components can be machined in-house at jbj Techniques to customer specification to suit many applications.

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Contact the team of highly qualified and experienced engineers 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

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