The high-performance ROBA-DS shaft couplings from Mayr transmit torque backlash-free and with high torsional rigidity. They compensate for shaft misalignment and are both wear- and maintenance-free. On the sizes up to 150 Newton meters, Mayr power transmission are going to extend its standard hubs for mounting the shafts by a radially divisible hub – for easy and fast installation, even in difficult ambient conditions. They are suitable for large shaft distances and in all applications in which the drive aggregates must not be moved any more.
They are able to transmit high torques even at comparably small diameter, which makes them the ideal shaft couplings for dynamic drive systems with high speeds. These couplings are made of steel and high-strength aluminum alloys, which forms the basis for the extremely compact design.
The couplings compensate for radial, axial and angular shaft misalignments by means of the flexible disk packs. This way, they protect the bearings from unwanted wear and tear and prevent unnecessary downtimes and costs. In order to achieve backlash-free torque transmission, the disks in the fixing area are treated with a special blasting procedure. The ROBA-DS disk pack couplings are temperature-resistant, wear- and maintenance-free and transmit the torque with very high torsional rigidity. Therefore, they are especially suited for applications in extreme ambient conditions.
At permitted speeds of 3,000 rpm, shaft diameters of 45 to 79 mm cover torques from 35 to 150 Newton meters. The half-shells guarantee easy and fast coupling installation, even in difficult ambient conditions. Therefore, the hubs are used preferably in applications in which the drive aggregates such as the motor and the gearbox must not be moved after the positioning and aligning for coupling installation. These hubs are also recommended for large shaft distances, for example for cardan shafts in linear actuators, as in these cases the coupling is installed last and therefore has to be easy to install.
Installation is carried out radially: To do this, the coupling is brought to the shafts and pre-assembled with the axially moveable half-shells. Here, it is important that the markings on the half-shells and on the hub bodies overlap. Then, the cap screws must be tightened evenly and in several sequences to the required tightening torque. The ROBA-DS servo couplings are available as double-jointed couplings with a connection plate or a variable-length sleeve.