Metal bellow-type coupling ZR
15 – 170 Nm / metal bellow-type coupling
ZR is a double-cardanic metal bellow-type coupling with a an intermediate pipe welded on (intermediate shaft coupling). This cardan shaft is therfore optimally suitable for bridging large axial shaft distances.
Up to size 45 the hubs of the cardan shaft with metal bellow are made of aluminium, from size 46 from steel. The bellow is made of stainless steel, the intermediate pipe of steel.The length of the intermediate pipe is freely selectable. The range includes both frictionally engaged connections without feather keyway and positive-locking connections with feather keyway.
Featuresldl
- variable length up to 4 m
- high torsion stiffness
- high critical bending speed
- low moments of inertia
- easy radial assembly / disassembly
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ZR is a backlash-free, torsionally stiff and flexible all-metal coupling with a bellow made of stainless steel. Depending on size and type the coupling hubs are available made of aluminium or steel.
The metal bellow optimally compensates for axial, radial and angular displacements with conformal torque transmission and low restoring forces. At the same time ZR has a high torsional stiffness and a low mass moment of inertia. It is free from wear and maintenance and extremely easy to assemble.
Function
The torque is transmitted to the hubs via a metal bellow made of stainless steel. The connection of the bellow to the hubs is made in three different types: With sizes 5 to 12 the metal bellow is bonded to the hubs. For that reason the maximum permissible temperature range is from – 30 °C to + 100 °C. With sizes 16 to 55 the bellow is crimped with the hubs and secured by a brass wire pressed in. This ensures torque transmission of every single bellow layer. The bellow-hubs-connection sizes 55 and 65 is made by a welded connection.
