RSK-zapex Series zw-zwn type TORSIONALLY RIGID GEAR COUPLINGS German DIN Standard Design

Benefits

RSK-zapex-zw-zwn 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 this couplings. This coupling types are constructed on a modular principle.

This means that application-specific solutions can be delivered quickly. This couplings require very little maintenance. Regular grease or oil changes at the prescribed intervals prolongs the service life of the coupling.

Application

This couplings are especially suited for operation in harsh operating conditions, such as drives in the irons melting or cement industry.

This couplings are suitable for reverse operation and horizontal mounting positions

RSK-zapex gear coupling is a mechanical device used to connect two rotating shafts in a power transmission system. It consists of interlocking external and internal gear teeth that transmit torque via surface contact. Unlike simple rigid couplings, the RSK-zapex gear coupling allows for slight misalignment between shafts, helping to protect machinery from stress and premature wear while maintaining high transmission accuracy.

Working Principle
The RSK-zapex gear coupling works on the principle of gear-tooth meshing torque transfer. The two hubs, each with external crowned gear teeth, engage with corresponding internal teeth in the sleeve or flange components. As torque is applied to one shaft, it is transferred through the meshed teeth to the second shaft.

The crowned tooth profile compensates for minor misalignments by allowing slight angular movement between the teeth while maintaining full flank contact. This design provides high torque transmission efficiency and helps absorb shock or vibration, improving system performance and longevity.

Structure and Composition
A typical RSK-zapex coupling includes the following components:
Two Hubs with External Teeth: Each mounted on the respective shafts; the teeth are usually crowned to accommodate angular misalignment.
Internal Toothed Sleeves (or Flanges): Connect to the hubs via precision gear engagement.
Sealing Rings and Gaskets: Prevent lubricant leakage and protect the teeth from contamination.
High-Strength Fasteners: Secure the flanged sleeves and maintain structural integrity under load.
Steel Construction: High-grade alloy steel is used for both hubs and sleeves, often heat-treated for enhanced strength and wear resistance.
Lubrication System: Usually grease-lubricated to reduce friction and extend the service life of the gear teeth.

Key Features and Advantages
High Torque Transmission: Engineered to handle large torque loads even in compact design configurations.
DIN Standard Design: Interchangeable with other standard gear couplings, facilitating integration and replacement.
Misalignment Compensation: Accommodates angular, axial, and small radial misalignments between connected shafts.
Shock and Vibration Damping: Reduces impact loads on connected equipment during start-up or variable speed operation.
Long Service Life: Durable steel construction and efficient lubrication support extended operation in heavy-duty environments.
Backlash Minimization: Precise tooth geometry ensures smooth operation and minimal play.
Easy Maintenance: Grease-lubricated teeth and accessible design allow for inspection and servicing without dismantling the entire system.
Customizable Configurations: Can be adapted for vertical or horizontal installations, high-speed or high-temperature conditions.