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Heavy Duty Springs
While the definition may vary depending on who answers the question, heavy-duty coil springs generally are larger and sturdier than most typical springs. As such, heavy-duty springs are fabricated from thick metal wires of high-strength materials, offering robust, durable performance under such loading and use conditions. Heavy-duty springs are often engineered to meet specific loading requirements and maintain durability and longevity under the heaviest loads. Among other places, they are found in sizeable industrial equipment and construction machinery.
One key characteristic of a heavy-duty spring is the Spring Rate, which describes the stiffness of a spring by citing the force it takes to displace the spring to a given displacement. Heavy-duty springs have a higher spring rate than typical springs, requiring large forces to deform the helical coils. In this way, the term “high spring rate” spring is sometimes used to refer to all types of heavy-duty springs generically.
When shopping for heavy-duty springs of all types, it’s vital to carefully perform all spring stress calculations to ensure that the spring is not over-stressed in its application. This is because equipment and industries in which heavy-duty springs operate are demanding, requiring careful design attention to specify a heavy-duty spring that will operate reliably.
Explore Our Heavy Duty Springs Range
You can shop for all stock heavy-duty springs across the three primary spring types by filtering on the maximum spring rate available for each spring type.
Custom Heavy Duty Springs
We offer custom heavy-duty spring design and manufacturing services if you can’t find the heavy-duty spring in the size and spring rate you need within our expansive catalog.
Standard heavy-duty spring customization options include large wire diameters, high-performance materials, additional surface finishes, and customized heat treatments.
In addition, die springs are a subset of heavy-duty compression springs, which have rectangular wire cross-sections and are more robust versions of heavy-duty compression springs.
We are ready to partner with you in all stages of development, from initial concept to procurement, to help you develop custom spring solutions engineered to withstand the heaviest industrial loading and use conditions.
Don’t waste another minute; reach out to our experts today!
Custom Heavy Duty Spring Manufacturing Capabilities
We proudly offer state-of-the-art manufacturing equipment to deliver high volumes of custom springs. We have cutting-edge CNC compression self-monitoring and coiling machinery to manufacture custom heavy-duty springs in large wire sizes and outer diameters for a wide range of spring types and end configurations.
We also provide complete prototyping and tooling assistance services to help you navigate complex design constraints and space envelopes.
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Heavy Duty Springs: Information & Resources
Heavy Duty Spring Types
Heavy-duty spring types are generally available in each of the following spring types. Century Spring offers custom design and manufacturing services to deliver the heavy-duty spring you need for all types of springs and load requirements.
Heavy Duty Compression Springs are found in suspension systems of large commercial vehicles. These springs are iconic, visible components of these vehicle’s suspension systems.
In addition, die springs are exclusively employed in manufacturing equipment such as dies and production tooling.
Heavy Duty Extension (or Tension) Springs can be found in various safety-critical aerospace systems, such as landing gear suspensions and door assemblies. They are also integrated into individual control surface actuation systems, providing critical tension between linkages so that the aircraft is able to maintain stable flight.
Heavy Duty Torsion Springs are used in construction machinery and agricultural and industrial equipment such as tractor engines and plows. Torsion springs in such applications see large industrial loads and are exposed to extreme temperatures and corrosive chemicals.
How to Select a Heavy Duty Spring
Generally, a heavy-duty spring is defined by two critical geometric properties, such as the Outer Diameter (OD), which is usually larger than a typical spring’s OD. The spring’s Wire Diameter is the thickness of the metal used to form the helical coils.
The Spring Rate of heavy-duty springs is the property of a spring that measures the resistance of the spring to compression forces. You can use the spring rate of a heavy-duty spring to calculate the deflection under design loading conditions. In general, the spring rate of heavy-duty springs is much larger than standard springs, and this property is fundamental in heavy-duty spring design because of the large loads these springs are designed to accommodate.
Another important feature of note for manufacturability purposes for custom heavy-duty springs is the Spring Index. Defined by the ratio of the Mean Diameter to the wire diameter of the spring, it is a quick calculation to assess the overall manufacturability of the spring. This parameter is important for heavy-duty springs that are typically fabricated from large wire diameters.
Finally, consider whether additional corrosion or temperature resistance is required for your application to determine the material and surface finish options for your heavy-duty spring.
Typical Tolerances
Spring tolerances depend on the exact spring type and geometry. As such, we have performed extensive empirical studies, which we have used to develop tolerance equations for different manufacturing techniques. We have combined these with the best industry standards to create general tolerance ranges for heavy-duty springs. However, these calculations can be very involved, so we have integrated them into our design and manufacturing automation software.
However, if you contact our design team today, we will gladly walk you through these calculations to provide general tolerance values for your spring type and geometry!
FAQs About Heavy Duty Springs
Do I need a custom design?
Standard heavy-duty springs are readily available in various sizes and specifications. However, if you need a custom-designed heavy-duty spring with a large spring rate you do not see in our catalog, you can call us at 800-237-5225 or fill out our Custom Quotation Form today!
What material should I choose for my heavy duty spring?
Common heavy-duty spring materials include high-carbon steel (such as music wire), oil-tempered steel, chrome silicone, and stainless steel. You should first consider your application’s loading requirements, followed by the corrosion and temperatures of your application, to determine a suitable material for your heavy-duty spring.
Why Choose Century Spring
Our Commitment to Quality and Service
Century Spring is a quality-first, ISO 9001 and AS9100D certified, industry-leading spring supplier specializing in stock and custom springs. We are the most trusted name in spring manufacturing and offer products and expertise to serve every corner of the stainless steel spring market.
Our experienced product engineers, knowledgeable product quality team, and skilled manufacturing personnel always deliver the highest quality products to you faster than our domestic and international competitors. Our springs are always made in the USA.
We offer rapid delivery on over 40,000+ in-stock designs available to ship today. We are committed to getting products to you as quickly as possible because we understand your design scheduling constraints.
Visit us today to discover how our commitment to quality and customer satisfaction vastly improves your product design process!
Innovation and Customization in Spring Manufacturing
We bring extensive design for manufacturability (DFM) expertise to your project. We also have dedicated, high-speed machines that can quickly scale high-quality spring production processes to large part volumes.
We also have cutting-edge computational equipment simulation and testing techniques, such as CNC compression self-monitoring and coiling machinery. These capabilities enable us to deliver durable, reliable products across many custom sizes and styles.
Our manufacturing services also include complete prototyping and tooling assistance.
Our team will work directly with you to create, refine, and optimize spring designs to fit specific tolerance, performance, and use case conditions. We are ready to partner with you to solve your most challenging spring design challenges.
Get In Touch
Contact Information
Contact us directly today, and let our experts resolve all your technical and sales questions. We can also guide you to one of our in-stock tapered springs that will fit your application.
If you need immediate assistance, you can always reach us at our dedicated phone line to speak directly with our team: 800-237-5225.
We are ready to provide comprehensive engineering support from your earliest design stages to final product approval.
Request a Quote and Consultation
We can also help you evaluate custom tapered spring design options and determine whether a custom design would better suit your application.
Simply Request a Custom Quotation so we can partner with you to customize a tapered spring for your unique application.
Once we hear from you, our design team will follow up with a quote for a custom solution and be happy to answer any follow-up questions you may have.