How to Size a Hydraulic Cylinder

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What Are the Factors to Consider When Sizing a Hydraulic Cylinder?

When sizing a hydraulic cylinder, there are several factors to consider. These include:

  • The size and weight of the load
  • The type of hydraulic actuator
  • The type of hydraulic fluid
  • The available pressure from the hydraulic system
  • The required speed of the actuator
  • The available space for the actuator
  • The pressure rating of the cylinder
  • The temperature of the environment

By considering all of these factors, you can accurately size a hydraulic cylinder for your application.

How to Calculate the Cylinder Bore and Stroke Length

Once all of the factors have been taken into consideration, you can proceed to calculate the cylinder bore and stroke length. The bore is the internal diameter of the cylinder and is determined by the load size and required force. The stroke length is the distance travelled by the piston and is determined by the required speed and available space.

To calculate the cylinder bore, use the following formula:

Cylinder Bore = Load Size x Required Force x 7.5

To calculate the stroke length, use the following formula:

Stroke Length = Available Space x Required Speed x 25

How to Confirm the Cylinder Sizing Has Been Done Correctly

Once the calculations have been made, you can confirm that the sizing of the cylinder has been done correctly by performing a few tests. First, check that the cylinder bore is greater than the load size. Next, check that the pressure rating of the cylinder is greater than the available pressure from the hydraulic system.

Finally, check that the cylinder has sufficient clearance within the available space. This will ensure that the piston can move freely and efficiently within the cylinder.

What Measures Should Be Taken to Prevent Sizing Errors?

To prevent any sizing errors, it is important to take the following measures:

  • Carry out accurate calculations using the correct formula.
  • Check the pressure rating of the cylinder.
  • Check the clearance within the available space.
  • Check the compatibility of the hydraulic actuator with the hydraulic system.
  • Check the compatibility of the hydraulic fluid with the hydraulic system.
  • Check the temperature of the environment.


Sizing a hydraulic cylinder correctly is essential for the efficient and safe operation of the hydraulic system. By considering all of the factors and taking the necessary measures, you can ensure that the hydraulic cylinder is sized correctly. For more information, please contact the technical department of Xinlan, and we will be happy to assist you. Our experienced technicians will respond to your inquiry within 24 hours.

At Xinlan, we are dedicated to providing high-quality hydraulic cylinders for all your applications. Our products include hydraulic tilt cylinder, hydraulic steering cylinder, hydraulic lift cylinder, aerial work platform cylinder, hydraulic cylinder for Sany Heavy Industry, and sanitation vehicle cylinder lift cylinder. With our advanced production equipment and considerate services, we guarantee our customers the best prices and products.

Take a tour of our VR factory to experience our high-quality products. We also welcome customers to customize with drawings or samples. To learn more about our products and services, please watch the video below.