Selection and application scenarios of the fit between the inner hole of the coupling and the shaft center

The application scenarios where the inner hole of the coupling is used in conjunction with the shaft center:

When designing for some situations and occasions, the interference fit stipulated in the design manual or commonly used ones can be deviated from, and appropriate adjustments can be made according to the usage site.

1. Situations where spare parts are consumed rapidly and need to be replaced frequently

In some industries and occasions, spare parts are consumed relatively quickly and need to be disassembled and replaced frequently. For these shaft extensions, H7/N6, H7/GB and other combinations can be adopted.

2. Low-speed, heavy-load applications where couplings are not required for centering

In some places, although the speed is low and the load is heavy, the impact and vibration are relatively small. Couplings are only used to transmit torque and do not need to be used to fix the center position. For instance, the CL type coupling can adopt clearance fit. It neither affects usage nor brings convenience to the maintenance and repair of the equipment.

3. In situations where there is impact or vibration but flexible grips can be used

For some situations where the torque is not large, the impact and vibration are relatively severe, but flexible connectors can be used, clearance fits can also be adopted. At this point, the vibration and impact generated between the shaft extension and the coupling can be detected by the elastic device in the middle. If disassembly is required, it does not need to be carried out with great effort.

In conclusion, for all couplings that transmit torque by keys, as long as they do not affect usage, transition or clearance fits can be adopted. This will bring convenience to the maintenance and installation of the equipment.