Reducing coupling complexity when installing gearmotors with solid/hollow output shafts is often desirable to simplify the mechanical design, improve efficiency, and minimize potential points of failure. Here are some methods to achieve reduced coupling complexity:

1. Direct Coupling:

   - When the gearmotor output shaft diameter matches the input shaft diameter of the driven equipment (e.g., a pump, conveyor, or fan), direct coupling can be employed. This eliminates the need for any additional coupling components.

2. Integrated Couplings:

   - Some gearmotor models come with integrated couplings or coupling elements on the output shaft itself. These built-in couplings can reduce the need for separate couplings in the system.

3. Flexible Couplings:

   - If a coupling is necessary but coupling complexity needs to be minimized, flexible couplings can be used. These couplings accommodate slight misalignments and can be easier to install than rigid couplings.

4. Keyed Shafts:

   - Keyed output shafts on gearmotors provide a simple and direct means of coupling to other components, such as pulleys, sprockets, or gears. The keyway ensures proper alignment and torque transmission.

5. Tapered Shafts:

   - Tapered output shafts are designed to fit tapered components, like pulleys or sheaves, providing a secure and concentric connection without the need for additional couplings.

6. Flange Mounting:

   - Flange-mounted gearmotors can be directly attached to a driven component with a matching flange. This eliminates the need for separate couplings and ensures a rigid connection.

7. Adapter Plates:

   - In some cases, adapter plates or hubs can be used to connect the gearmotor to the driven equipment. These plates simplify coupling and alignment.

8. Custom Machining:

   - Depending on the specific requirements of the application, custom machining of shafts or components may be an option to create a direct and simplified coupling arrangement.

9. Universal Joints:

   - For applications that require flexibility in the coupling, universal joints can be used to accommodate misalignments while still providing a relatively straightforward coupling solution.

10. Gear Couplings:

    - In cases where high torque transmission is required, gear couplings can be used as they offer compact and efficient coupling with reduced complexity compared to some other high-torque coupling methods.

When choosing a method to reduce coupling complexity, it's essential to consider factors such as alignment accuracy, torque requirements, system flexibility, and the specific characteristics of the gearmotor and driven equipment. Additionally, consulting with the gearmotor manufacturer or a mechanical engineer with expertise in power transmission can help in selecting the most appropriate and efficient coupling solution for your application.