The Ultimate Guide to Disc Springs: Everything You Need ...

Disc Springs, also known as Belleville disc springs, Belleville springs, Belleville washers, or conical washers, are specialized precision components designed for axial loading. Unlike other types of springs, Disc Springs have consistent and repeatable force/deflection curves that can be reliably determined using standardized calculations of DIN EN 16983 (formerly DIN 2093). They can withstand static loads continuously or intermittently, as well as dynamic continuous load cycling. Multiple Disc Springs can be used in parallel, series, or a combination to achieve the desired force-deflection characteristic.

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Disc springs are perfect for high load situations, particularly when there is limited space available. These conical springs consist of a convex disc with the outer edge working against the center of the disc, resulting in a strong spring force within a compact range of motion. This unique design allows for higher loads to be supported with minimal deflection and a smaller solid height compared to traditional helical springs. Due to their versatility, disc springs are widely utilized in various manufacturing and industrial settings. They have many common applications, such as:

• Managing or suppressing vibrations
• Thermal expansion
• Valves
• Relaxation and Bolt Creep Problems
• Spring actuated brakes
• Energy storage
• Slip and overload clutches

In critical applications such as safety valves, elevator clutch and brake mechanisms, and industrial pipe system supports, Disc Springs are the preferred choice due to their predictability, reliability, and unmatched fatigue life.

When axial loading is necessary for your application, disc springs offer the ideal solution. Our discs can be designed as either single or stacked, depending on the specific requirements of our customers.

At SpingXpert, we have a wide selection of disc springs available for immediate shipment, including over 500 unique designs from our extensive inventory. If you require a custom disc spring, our team can design and produce it to your exact specifications, whether you need a small or large quantity.

Our spring and Belleville products are essential components in a wide range of sensitive applications within the oil services industry. These include safety valves, compression valves, chemical processing valves, completion tools, artificial lift pumps, oil well packers, drilling tools, and down-hole communications equipment.

Disc Springs have several advantages over other types of springs, such as:

• A wide range of load/deflection characteristics
• High load capacity with small deflection
• Space savings – high load to size ratio
• Consistent performance under design loads
• Longer fatigue life
• Inherent dampening, especially with parallel stacking
• Flexibility in stack arrangement to meet your application requirements

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Austenitic stainless steel is a popular choice for applications with minimal movement and exposure to corrosion. On the other hand, nickel stainless steel has proven its durability in fresh water and marine environments, as well as various industrial settings such as acidic conditions. However, it should be noted that this material may experience work hardening over time, limiting its cycle life but maintaining good resistance to creep.

Disc springs are available in a range of sizes and materials including stainless steel, phosphor bronze, carbon steel, and chrome vanadium steel. At SpringXpert, we provide extensive capabilities and a diverse selection of options for your disc spring manufacturing requirements. This includes advanced quality control systems and expertise in regulations like RoHS, REACH, and DFARS. We also offer CAD-assisted product design, in-house prototype production services, and a global supply chain network.

We have EN 16983 (DIN 2093), Din 6796 disc springs, Belleville washers, serrated safety washers and slotted disc springs in stock. Our material selection includes 51CrV4, CS70 and CK67, as well as Stainless Steel 300 Series Din 1.4310, Din 1.4568 and Din 1.8159. Our stock disc springs and Belleville washers come in imperial and metric sizes to fit various applications and bolt sizes.

Choose from our wide range of standard options or utilize our Engineering design service to collaboratively determine the best Disc Spring or Disc Spring Stack for your application and assembly requirements.

Often the performance of mechanical assemblies is impacted due to the loosening of fasteners from vibration. That's why a wide range of mechanical assemblies use disc springs or spring washers to keep the nuts and bolts tight and tensioned while providing constant pressure on them. Users have the option to choose from a wide variety of disc springs according to the design and requirements of the mechanical application. However, it is always important to pick the right spring washers by focusing on certain features. While comparing the disc springs, it is important for the buyer to concentrate on three important parameters: torque, diameter, and finish.

Important Parameters to Choose the Right Disc Springs

1) Torque

The term torque refers to the force required to be applied to the bolt to flatten the washer to its optimum shape for clamping. But the amount of torque required to make the washer reach the optimal tightness varies. Normally, the amount of torque varies according to the diameter, hardness, and material configuration of bolts. So, you need to ensure that the torque of the spring washer perfectly complements the bolts. The compatibility will make the bolt and washer work seamlessly over a longer period of time.

2) Diameter

The disc springs are designed specifically to produce a clamping force along the tip of its cup perimeter. So, the clamping force will vary according to the size of the cup. For instance, if the cup is too big or overhangs, the connection will be impacted due to less clamping force. Many users put an oversized flat washer beneath the spring washer to increase the clamping force. But the method fails to transmit more clamping force to the connection as the flat washer often deflects away from the disc spring. That is why you must choose a disc spring whose diameter matches the connection pad that will be used on it. It is also a great idea to use custom spring washers that perfectly complement the connection pad.

3) Finish

Most users opt for disc springs with a standard finish. But you still have the option to choose spring washers with varying finishes. You must remember that the wrong finish can make the connection fall apart. For instance, the presence of hydrogen can make the electroplated spring washers brittle. Likewise, hydrogen-exposed electroplated washers may break into pieces due to vibration. So, you must consult with the product applications expert about the finishing required to make the disc springs combat the solvents or fumes present in the environment.

It is also important for the buyer to choose disc springs designed by a reputable manufacturer. Some manufacturers, like Vinsco, help buyers in picking the perfect spring washers for their mechanical applications by posting all required information on their websites. As Vinsco clearly mentions the features and specifications of spring washers, a buyer can easily compare the models based on torque, diameter, and finish.

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