13
Sep

GEAREX® DB

Product characteristics
  • Double-cardanic all-steel coupling
  • High torques at small overall dimensions
  • Range of use from - 20°C up to + 80°C
  • Application area, e. g. general engineering
  • Both hubs turned outwards
  • Bridging of a bigger shaft distance dimension
Coupling description GEARex® couplings made from steel with grease lubrication and toroidal sealing ring correspond to the international standard. Being flexible shaft connections they are suitable for a positive torque transmission. In addition, they ensure to compensate for axial, radial and angular shaft displacements. GEARex® couplings are used in every range of general engineering requesting for high operating safety and a long service life resulting from the reliable grease lubrication of the crowned spline. The couplings are suitable for horizontal assembly. As special solutions they are suitable for vertical assembly, too. Numerous coupling sizes for a torque transmission from 175.000 Nm to 510.000 Nm with shaft dimensions up to a maximum of Ø 390 mm are available. The coupling torques may be increased by using special materials.
Operating principle
According to the operating principle of the well-known crowned gear edge pressure in the spline is avoided in case of angular and radial displacements. Moreover, permanent grease lubrication produces a better friction ratio of the spline with an operation almost free from wear along with a long service life of the coupling. In order to ensure a regular and verified lubrication in assembled condition, two connections for hydraulics are arranged opposite to each other radially on each coupling sleeve. As a result a complete GEARex® coupling has four connections being offset to each other by 90°. The interior of the coupling is sealed by means of toroidal sealing rings (NBR 70 ShA). The feather keys have to be sealed against escape of lubricants during the assembly.

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