www.jbj.co.uk/couplings.html#flender Design Complies with the current ATEX Directive for: I M2 Materials » Hubs and flanged sleeves: Steel. » Lubricant: Grease filling. Coupling suitable for use in potentially explosive atmospheres. II 2 GD c 120 °C (T4) -20 °C ≤ Ta ≤ +80 °C ZAPEX gear couplings link machine shafts and compensate for shaft misalignment with weak restorative forces. High transmissible torque combined with compactness and light weight are characteristic of ZAPEX couplings. ZAPEX coupling types are constructed on a modular principle, so application related solutions can be delivered quickly. This coupling requires very little maintenance. Regular grease changes at the prescribed intervals prolong the service life of the coupling. ZAPEX couplings are especially suited for operation in harsh operating conditions, such as drives in the iron smelting or cement industry. ZAPEX couplings are suitable for reverse operation and horizontal mounting positions and, in the case of type ZWNV, for vertical mounting positions. Benefits Application » O ring: Perbunan. A ZAPEX coupling comprises two hub sections with external teeth which are mounted on the machine shafts. Each set of external teeth engages in a flanged socket with mating internal teeth. The flanged sleeves are connected via two flanges with close-fitting bolts. The teeth are lubricated with oil or grease. On the ZAPEX type ZW, DUO sealing rings are used to seal the tooth space. The DUO sealing rings prevent the lubricant from escaping and dirt from entering the tooth space. The parallel keyways must be sealed during assembly to prevent lubricant fromescaping. Customized hub designs are described after the types. Function The torque is transmitted through the coupling teeth. The teeth are crowned, so angular displacement per tooth plane is possible. Radial displacement can be compensated for via the space VAbetween the tooth planes. The internal teeth of the flanged sleeves are significantly wider than the external teeth of the hub parts, permitting a relatively high axial misalignment. A small angular misalignment on the coupling teeth results in an advantageous distribution of the lubricant film and a very low wear rate. This favourable condition can be deliberately set by aligning the drive with themachine shafts with a slight radial misalignment. 21 #DriveLineHarmony Zapex ZN Series Introduction Torsionally Rigid Gear Couplings ZNN Standard type ZNNA with axial backlash limiter Type Description: ZNW with intermediate shaft Further application-related coupling types are available. ZNNV Vertical type Information available on request. ZNBG with straight brake disk ZNZA with adaptor & axial backlash limiter Zapex ZW Gear Coupling Types ZNZS with adapter ZNN for axial displacement
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