1.Direct connection
Directly connecting a hybrid stepper motor to a shaft is the simplest and most common method. This method is suitable for situations where low-speed and high-torque output is required. The connection method is as follows:

1.Fasten the shaft to the motor bearing.
2.Fit a key with the shaft keyway and fasten it to the motor shaft.
3.Pass the clamping sleeve around the shaft and key in turn, and then tighten the screws to achieve the connection between the motor and the shaft.

2.Connect through a coupling
The use of a coupling can expand the connection error range and reduce mechanical vibration and noise. The coupling has a certain elasticity and torsional capacity, so it can effectively alleviate the torque mismatch problem between the motor and the shaft. The connection method is as follows:

1.Select the appropriate coupling type.
Common coupling types include shaft couplings, elastic couplings, universal joint couplings, etc. It is necessary to select a suitable coupling based on factors such as the model of the motor and shaft, the workload and the speed.
2.Install the coupling on the shaft and motor bearings.
Install the coupling on the shaft and motor bearings, and install the coupling according to the instructions.
3.Perform vertical alignment check.
Install the motor on the base and perform vertical alignment check on the shaft to ensure that the connected shaft and motor are on the same axis.
How to select a coupling:

The following factors need to be considered when selecting a coupling:
1.Workload.
Factors such as input and output torque, speed and rotation angle need to be considered.
2.Operating environment.
Temperature, humidity and other conditions of the operating environment need to be considered.
3.Rotation accuracy.
The rotation angle and error range that the coupling can withstand need to be considered.
4.Maintenance cost.
The maintenance and replacement cost of the coupling needs to be considered.

3.Summary:
There are two main ways to connect the hybrid stepper motor to the shaft: direct connection and connection through a coupling. When selecting a coupling, factors such as workload, operating environment, rotation accuracy and maintenance cost need to be considered to ensure the reliability and accuracy of the connection.