Purchase Guide:How Do You Choose a Linear Motor?

Purchase Guide:How Do You Choose a Linear Motor?

In industries ranging from automotive manufacturing to precision robotics, linear motor selection can significantly impact the efficiency and results of operations. Choosing the right linear motor is critical to optimizing performance and cost-effectiveness.

1.Learn about the different types of linear motors

Linear motors mainly come in the following forms, each with its own characteristics and applicable fields:

Flatbed Motors: provides robust performance and efficient heat dissipation. Ideal for applications requiring high force and thermal stability.

U-Channel Motors: These motors provide excellent protection for the windings. Preferred in environments with debris and cooling factors.

Tubular Motors: Tubular motors offer a compact, efficient design. Ideal for applications requiring dynamic motion and limited space.

2.Assess needs

Force requirements are a key factor in motor selection. To calculate the force required, add the forces required to move the load, overcome friction, and offset any other resistance forces. To ensure reliable operation of the application, it is recommended to select a motor with an output force that is at least 10-20% higher than the calculated requirements.

3.Stroke length and motor size

Stroke length (the distance the motor needs to travel) directly affects motor selection. Make sure the selected motor can handle the required stroke length without sacrificing speed or accuracy. The motor size should match the installation space and integration complexity.

4.Speed and accuracy

Speed requirements depend on the application's operational needs. High-speed applications may require motors with specialized windings and enhanced thermal management. For industries such as semiconductor manufacturing or fine printing, motors with high-resolution encoders and minimal mechanical clearance are needed to meet accuracy requirements.

5.Load and installation configuration

Evaluate the load to ensure it is within the thrust capability of the motor. Consider the mounting configuration: whether the motor will move vertically or horizontally, which affects the type of motor and the mounting hardware required.

6.Thermal management

Effective thermal management can prevent overheating and extend motor life. Options typically include passive cooling, active cooling systems and the use of radiators. The specific choice depends on the motor's environment and duty cycle.

7.Environment and Durability

For harsh environments, choose a motor with a higher IP rating to protect against dust and water ingress. If you are concerned about chemical exposure, you need to choose a motor made from corrosion-resistant materials.

8.Integration and Compatibility

Make sure the motor is compatible with existing power and control systems. This mainly includes checking voltage compatibility, control interfaces, and physical connection options.

9.Cost, Availability and Support

In addition to the initial cost, consider the total cost of ownership, which includes maintenance, spare parts and energy consumption. You can reduce downtime by choosing a supplier that offers technical support and quick access to spare parts.

10.Case Study

For example, in the automotive industry, flat-plate motors are used in robot arms that need to move accurately and quickly under high loads. In contrast, in the pharmaceutical industry, tubular motors are more suitable due to their precise control in pipetting systems.


Choosing the right linear motor requires balancing factors such as technical specifications, environmental conditions and budget. A right choice can effectively improve the efficiency and reliability of operations.


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