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Flat Springs

A reliable source for Flat Springs information and leading Flat Springs Companies & Manufacturers.

Flat springs are small metal components that store and release energy. These springs are used for controlling deflection in small and restricted spaces. Flat springs are not coiled; instead, they are flat, which makes them different from extension and compression springs. Read More…

Flat Springs Flat springs, a common type of spring manufactured from strip material, derive their name from their shape, which generally has a high width-to-thickness ratio.
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Leading Manufacturers

Lake Geneva, WI  |  262-249-7854

R&L Spring Company manufactures custom spring and wire formed components for industries such as powersports, automotive, medical devices, and general industrial. Products include compression, extension, and torsion springs, as well as rings, wire forms, fourslide components, and long coils. Wire diameters available from .001" to .750" in both shaped wires and flat stocks. Their experienced team is able to meet the most demanding parts specifications. IATF16949 and ISO9001 certified.

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R & L Spring Company $$$

Spring Grove, IL  |  815-675-1350

All-Rite Spring Company specializes in quick-turn design, prototype, and manufacture of springs and wires of all shapes, sizes, and material types. Typical applications are: Automotive, Agricultural, Consumer Appliance, Industrial, Safety Critical, and other High Functional Value and/or Life Cycle.

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All-Rite Spring Company $$$

Grand Rapids, MI  |  616-591-9524

Apex Spring & Stamping is a certified minority owned company that manufacturers springs, stampings, wire forms, clips, and fasteners. Our core industries include automotive, office furniture, medical, recreational, consumer goods, and appliances. We also specialize in value added assembly and prototyping. Our engineering team will ensure your part is both functional and cost-effective. IATF 16949 Certified.

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Apex Spring & Stamping Corporation $$$

Houston, TX  |  713-849-4000

Coiling Technologies, Inc. has the experience and expertise to design and engineer the custom springs to meet your specific requirements. We are a leading manufacturer of high-tech, specialized springs and we are committed to providing quality products with fast lead times. Our automated process allows us to produce the reliable springs you need.

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Coiling Technologies, Inc. $$$

Chicago, IL  |  800-969-7884

Sterling Spring has offered high-quality springs since 1953. Our product line includes compression springs, coil springs, torsion springs, extension springs and industrial springs. We offer just-in-time delivery and cost-effective prices, regardless of your ordering volume.

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Sterling Spring Corp. $$$

Glenshaw, PA  |  412-684-1201

Diamond Wire Spring Company is a designer and manufacturer of precision springs. We have over 75 years of experience in stock and custom springs. Our founding principles of providing quality products and strong, personalized customer service help us earn the trust of our customers. We have more than 11,000 different springs available. We serve many industries including power and energy, agriculture and rail, and many others. Call us today!

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Diamond Wire Spring Company $$$

Bristol, CT  |  860-582-6368

Our springs are made of a variety of materials and can be used in many different applications. Pa-Ted manufactures custom designed springs for the automotive, electrical, medical, landscaping, pool covers, and original equipment manufacturers industries, and uses materials such steel, beryllium copper, music wire, brass, titanium, tungsten wire, oil tempered wire, and resistance wire. Call us for wire forms today!

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Pa-Ted Spring Co., LLC $$$
placeholder image R & L Spring Company All-Rite Spring Company Apex Spring & Stamping Corporation Coiling Technologies, Inc. Sterling Spring Corp. Diamond Wire Spring Company Pa-Ted Spring Co., LLC

Flat springs are made of high carbon steel, nickel-silver steel, high nickel alloy, stainless steel, beryllium copper combination, and phosphor bronze material. Selecting the best type of material is important in spring manufacturing. For example, stainless steel provides better protection against corrosion, and high carbon steel offers durability and rigidity.

Flat Springs

Configurations of Flat Springs

Flat springs come in various configurations depending on the application of the product. These are:

  • Leaf Springs

    Leaf springs are a type of flat spring made from individual layers, or leaves, of metal. They are important components in automobiles, such as cars. Leaf springs are used in suspensions, automotive design, repair, and steering axles, and they reduce wear and tear on other vehicle parts. Leaf springs are made with high alloy steel or lighter-weight materials such as low-carbon steel.

    Leaf springs come in three basic types:

    • Mono-Leaf Springs

      Consists of one single steel plate placed uniformly from the center to the end of the spring.

    • Multi-Leaf Springs

      Consists of multiple steel plates or metal stacks of tapered leaves attached by a bolt.

    • Parabolic Springs

      Consists of stacked layers of steel attached to the vehicle through a spring eye on both sides of the spring.

    Leaf Springs
  • Flat Coil Springs

    Flat coil springs are used with a counterweight, which controls the actions of the valves. They are used in the automotive industry, such as in vehicle exhaust systems. They are designed to absorb shocks and are used in seating to provide support.

    Flat Coil Springs

Manufacturing Process of Flat Springs

The process of heating and treating a flat spring is categorized into four steps. These are:

  1. Shaping the Spring

    • The first step is shaping the spring. A flat annealed spring steel is measured and marked according to the requirements.
    • Polishing the spring is also required so that the spring will bend correctly.
    • The spring can be bent by either a cold or hot process.
    • After heat bending, it is important to let it cool down without water to not cause scaling in the spring.
  2. Hardening the Spring

    • The next step is hardening the spring, which can be done using a carburizing flame.
    • The spring is heated to cherry red by the flame and then quenched in the oil.
    • The heating temperature depends on the type of material used; however, a temperature around 1500 ℉ (815 °C) is ideal.
  3. Tempering the Spring

    • Tempering the spring reduces the hardness and brittleness and provides toughness and flexibility to the spring.
    • Before this process, brushing the spring is necessary to remove any scaling on the spring.
    • Tempering temperature depends on the type of spring material.
    • First, the spring is heated to a high temperature and let to cool dry.
    • Tempering can be done using lead baths, burning oil in a pan, or with a torch.
  4. Testing the Spring

    • Testing the spring is the last step of the process.
    • The spring is placed in the object where it belongs and tested to see if it can bend or flex.
    Testing the Spring

Working of Flat Springs

Flat springs are cupped and have a little curvature that stores mechanical energy. When these springs are exposed to a weighted object, the cupped design causes compression. This compression allows the flat spring to store and release the object's energy. The cupped design will also exert a force against the object being used.

Applications of Flat Springs

Flat springs come in various shapes and sizes according to their applications. They are ideal for use in limited areas. Flat springs are widely used in motors, counterbalances, switches, office equipment, generators, doors, electrical contacts, leaf springs, disc washers, hold downs, shims, clips, and more.

Flat Springs Informational Video


Spring Power Pages

Coil Springs

Coil Springs

A coil spring is an elastic element made of metal or heavy plastic in the form of curls or ringlets of round wire or cord that is wrapped around a cylinder. The winding of a coil spring can be loose or tight in a helical shape depending on the application for which it is made...

Compression Springs

Compression Springs

Coil springs called compression springs can store mechanical energy when they are compressed. These open-coiled, helical springs provide resistance to compressive loading. When these springs are...

Extension Springs

Extension Springs

Extension springs are helical wound springs that are so closely coiled together to create initial tension in the coils. This initial tension creates resistance against the force applied to its ends for extension. The initial tension helps determine how closely and...

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