A Leaf Spring is an important suspension part which supports not only the vertical movement of the vehicle body, but also movement in various directions. It consists of mutilayered steel boards which, by optimizing the thickness and number of leaves, allows for stable, smooth driving and a comfortable ride, so is used in many vehicles such as trucks, trailers and buses.
Leaf spring on trailer specifications
| Model | Leaf Spring Type | Single Leaf Length (mm) | Width (mm) | Thickness (mm) | Number of Leaves (pcs) | Max Load Capacity (kg) | Application |
|---|---|---|---|---|---|---|---|
| Luen-3000 | Single Leaf Spring | 900 | 70 | 8 | 1 | 3000 | Light-duty trucks, small trailers |
| Luen-5000 | Multi-leaf Spring (3 leaves) | 1200 | 90 | 10 | 3 | 5000 | Medium-duty trucks, standard freight trailers |
| Luen-8000 | Multi-leaf Spring (5 leaves) | 1500 | 100 | 12 | 5 | 8000 | Heavy-duty trucks, large trailers |
| Luen-12000 | Heavy-duty Multi-leaf Spring (7 leaves) | 1800 | 120 | 15 | 7 | 12000 | Heavy-duty freight trucks, oversized trailers |
| Luen-15000 | Super Heavy-duty Multi-leaf Spring (9 leaves) | 2000 | 150 | 20 | 9 | 15000 | Extra heavy-duty trucks, machinery transport trailers |
| Luen-20000 | Special Multi-leaf Spring (10 leaves) | 2200 | 160 | 22 | 10 | 20000 | Super-heavy freight, engineering equipment trailers |
leaf spring for sale near me diagram
trailer truck leaf spring shippment
how to measure leaf springs
Measuring truck leaf springs accurately is essential for replacement, repair, or modification to ensure proper fitment and functionality. Here's how you can measure a leaf spring:
Measure the Overall Length:
The overall length of the truck leaf spring is measured from the center of the spring's main eye (or the center of the spring's main leaf bolt hole) to the center of the spring's other end (typically where the spring is mounted to the vehicle).
Use a tape measure or ruler to get the distance from eye to eye or from the mounting points.
Measuring the Distance Between Eye Centers:
For a more precise measurement, measure the distance from the center of one eye (the rounded or circular end of the leaf spring that attaches to the vehicle frame or axle) to the center of the other eye.
If the leaf spring on trailer doesn't have eye holes, you can measure the distance between the mounting points at each end.
Measure the Width of the Main Leaf:
The width refers to how wide the spring is across its broadest part. It is usually measured in inches or millimeters.
Use a ruler or caliper to measure the width at the widest part of the spring, typically at the base of the main leaf.
Measure the Width of the Tapering Ends:
In some cases, the ends of the leaf spring can taper, so you may need to take measurements from the end and the middle to understand the profile.
Measure the Thickness of the Spring:
The thickness of the truck leaf spring is critical, as it affects its load-bearing capacity.
Use a caliper to measure the thickness of the leaf spring at the base, particularly the main leaf. Measure both the center and the ends of the spring if they differ.
Measure the "Bow" or Arch:
Truck Leaf springs are not completely flat; they have an arch to provide suspension. Measure the amount of arch (or camber) from the top to the bottom at the center of the spring when it is unloaded.
You can use a straightedge or a ruler to measure the height from the base of the spring (when lying flat) to the highest point of the arch.
Center-to-Center Distance:
If the leaf spring has bolt holes (like in the case of mounting points), measure the center-to-center distance between the holes to ensure proper alignment with the vehicle’s suspension system.
Hole Diameter:
Measure the diameter of the bolt holes using a caliper or measuring tool.
Count the number of individual leaves in the spring pack. This can affect the spring's flexibility, load capacity, and ride quality. Springs with more leaves tend to have a higher load capacity, but less flexibility.
Material: Leaf springs are typically made of high-carbon steel, alloy steel, or composite materials. The material type influences its strength and performance.
Spring Rate: The spring rate is a measurement of how much force is needed to compress the spring by a certain distance (e.g., pounds per inch or Newtons per millimeter). This is more difficult to measure directly but can often be determined by the manufacturer or calculated based on the thickness, length, and material of the spring.
If you need to determine the radius of curvature for a replacement leaf spring, measure the radius from the center of the spring to the highest point of the arch, ensuring you're using a precise instrument like a radius gauge.
Tape Measure or Ruler: For overall length and width measurements.
Calipers: For precise thickness and hole diameter measurements.
Protractor or Angle Finder: For measuring the arch or camber.
Straightedge: For determining the amount of arch.
Radius Gauge (Optional): For measuring curvature.
Length: Measure from the center of one eye to the center of the other.
Width: Measure across the widest part of the spring (typically at the base of the main leaf).
Thickness: Measure the thickness of the spring at various points.
Arch: Measure how much the spring arches by placing a straightedge across the base and measuring the height from the arch to the straightedge.
Bolt Hole Measurements: Measure the center-to-center distance and the diameter of the bolt holes.
If you are purchasing LUEN trailer truck leaf spring, you can directly consult our product sales staff, who will give you the most accurate value
Buy high quality leaf springs from China leaf spring factory LUEN
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