Gas springs are essential components in a variety of applications, from automotive and furniture to industrial machinery. Understanding how to measure gas springs properly is critical for ensuring they function correctly and provide the needed support. Whether you’re replacing a gas spring or ensuring the correct size for your equipment, precise measurements will prevent issues like incorrect pressure or improper fit.
Measuring gas springs can seem complex due to their various dimensions and the forces at play. However, with the right tools and knowledge, you can easily determine the correct specifications. This post will guide you through the essential steps to accurately measure gas springs, giving you the confidence to select the right replacement or perform necessary maintenance.
From determining the stroke length to assessing the pressure within the gas spring, proper measurement ensures longevity and efficiency. If you are dealing with gas springs in everyday items or more technical machinery, understanding the measurement process is essential to maintaining optimal performance.

Contents
- 1 1. Measure the Stroke Length
- 2 2. Measure the Overall Length
- 3 3. Measure the Force or Pressure Rating
- 4 4. Measure the Diameter of the Body and Rod
- 5 5. Measure the Mounting Lengths
- 6 Conclusion:
- 7 FAQs:
- 7.1 What tools are needed to measure gas springs?
- 7.2 How do I measure the force rating of a gas spring?
- 7.3 What happens if I measure the gas spring incorrectly?
- 7.4 How do I measure the stroke length of a gas spring?
- 7.5 Why is the mounting length important?
- 7.6 Can I use the same gas spring for different applications?
1. Measure the Stroke Length
a. What is Stroke Length?
The stroke length refers to the maximum distance the piston can travel inside the gas spring. It is one of the most important measurements, as it determines how much extension the gas spring can provide. To measure it, simply extend the gas spring fully and measure the distance from the end of the body to the end of the piston rod.
b. How to Measure Accurately
For accurate results, use a ruler or tape measure with millimeter precision. The measurement should be taken in a straight line, ensuring the gas spring is fully extended. It’s crucial to avoid measuring the gas spring while it’s compressed, as the stroke length can’t be determined properly in this state.
c. Why Stroke Length Matters
Measuring the correct stroke length ensures that your gas spring can extend and retract as needed. Too short of a stroke, and the spring won’t reach its intended extension. Too long, and it may overextend and cause damage or malfunction. Getting it right is essential for the efficiency of your equipment.
2. Measure the Overall Length
a. Understanding Overall Length
The overall length refers to the length of the gas spring when it is fully compressed. This measurement will help you determine whether the gas spring fits in your designated space. Measure from one end of the body to the other when the gas spring is fully compressed and the piston rod is completely retracted.
b. How to Measure Overall Length
Use a tape measure to get an accurate measurement from one end of the gas spring body to the other. This measurement is important for ensuring that the gas spring fits within the space provided in the application. It will also help in determining the installation position of the gas spring.
c. Why Overall Length is Crucial
The overall length will dictate how much space the gas spring occupies in the compressed state. This is important when selecting a replacement or for new installations in compact areas. It’s critical to compare this measurement with the available space in your equipment to ensure a perfect fit.
3. Measure the Force or Pressure Rating
a. What is the Force Rating?
The force rating of a gas spring indicates the amount of force it can provide when fully extended. This is typically measured in newtons (N) and determines the lifting capacity of the gas spring. Force ratings vary depending on the application, such as lifting hatches, doors, or lids.
b. How to Measure Gas Spring Force
To measure the force or pressure, you will need a force gauge or a specific pressure tester designed for gas springs. Attach the gauge to the piston rod and measure the force exerted when the spring is extended. It’s essential to measure at the full extension of the spring to get an accurate force reading.
c. Why Pressure Rating Matters
The force or pressure rating helps you ensure that the gas spring can handle the load or weight of the application. A higher force rating may be required for heavier objects, while a lower force rating may suffice for lighter applications. Getting the right rating prevents damage and ensures optimal performance.
4. Measure the Diameter of the Body and Rod
a. Body and Rod Diameters
The diameter of the gas spring body and piston rod are important for fitting purposes. The body diameter refers to the outer width of the cylinder, and the rod diameter refers to the thickness of the piston rod. Measure these diameters with a caliper to ensure that they match the specifications for your application.
b. How to Measure Diameters Correctly
Use digital calipers for the most accurate reading of both the body and rod diameters. These dimensions are essential when selecting the correct housing for the gas spring or fitting it into tight spaces. The measurements should be taken at the widest point for the body and the thickest part of the rod.
c. Why Diameters Are Important
The diameters affect the stability, durability, and performance of the gas spring. A mismatch in diameters could cause improper fitment, leading to malfunction or damage. Ensuring the proper measurements guarantees that the gas spring fits securely and operates effectively.
5. Measure the Mounting Lengths
a. What Are Mounting Lengths?
The mounting lengths refer to the distance between the mounting points at each end of the gas spring. These measurements are critical for ensuring that the gas spring can be installed properly. Measure from the center of one mounting eye to the center of the opposite eye while the spring is in a relaxed state.
b. How to Measure Mounting Lengths
Using a tape measure, measure the distance between mounting points to determine the mounting length. Ensure that the gas spring is not compressed or extended while taking the measurement. It’s important that the gas spring aligns perfectly with your equipment’s mounting points.
c. Why Mounting Lengths Matter
Mounting lengths are crucial for proper installation and functionality. A mismatch in mounting lengths can prevent the gas spring from working correctly or cause damage to the components. Accurate measurements ensure the gas spring performs as intended and fits into the designated mounting space.
Conclusion:
Measuring gas springs correctly is an essential step in ensuring their performance and longevity. By accurately measuring the stroke length, overall length, force rating, diameters, and mounting lengths, you can guarantee that your gas spring functions effectively in any application. Whether you’re replacing an old spring or selecting one for a new project, precision is key.
Proper measurement helps prevent costly mistakes, ensures safety, and enhances the performance of your equipment. With the right tools and techniques, measuring gas springs can become a straightforward and empowering task that ensures the longevity of your machinery and devices.
FAQs:
What tools are needed to measure gas springs?
You will need a tape measure, calipers, and force gauge to measure the key dimensions of the gas spring accurately.
How do I measure the force rating of a gas spring?
Use a force gauge or pressure tester attached to the piston rod while the gas spring is fully extended to measure its force rating.
What happens if I measure the gas spring incorrectly?
Incorrect measurements can lead to improper fitment, causing damage to equipment and poor performance of the gas spring.
How do I measure the stroke length of a gas spring?
Fully extend the gas spring and measure the distance from the end of the body to the end of the piston rod to determine the stroke length.
Why is the mounting length important?
The mounting length ensures that the gas spring fits properly into the designated mounting points in your equipment or machinery.
Can I use the same gas spring for different applications?
It depends on the specifications. Each application requires unique measurements for stroke length, force, and mounting points, so make sure to match the measurements with the application requirements.