Belleville Spring Washers
Belleville spring washers work very much like compression spring washers, but offer several advantages. Belleville washers can work in tight areas where space requirements may not offer a large range of motion. Belleville washers are typically used as springs, or to apply a pre-load or flexible quality to a bolted joint or bearing. Also, they can handle high stresses over this short area of motion. In most cases such as these, compression washers would fail.
The performance of a Belleville spring washer is based on the ratio of height to thickness. When this ratio is small, the springs will normally carry high loads at small deflections. Springs of this ratio will normally give a relatively constant or declining load.
Belleville spring washers are also known as conical spring washers and spherical spring washers and usually have a truncated sphere form. Belleville spring washers are usually made from a combination of beryllium copper, high carbon steel, spring temper phosphor bronze or stainless. As stated earlier, Belleville spring washers provide a very high load capacity often used in cases to solve spring problems of high loads, small deflections and limited space.
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Multiple Belleville spring washers may be stacked to modify the spring constant, or better known as the amount of deflection. Stacking Belleville washers in the same direction will add the spring constant in parallel, creating a stiffer joint. Stacking in different directions is similar to adding springs in series, resulting in a lower spring contact and a greater rate of deflection. Mixing and matching directions allows for the designing of a specific spring constant and deflection capacity.
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Belleville Spring Washers, also known as Conical or Disc spring washers, provide the greatest load bearing capacity for their size. They compensate for joint expansion and contraction, spans holes and maintain high tension in screw and nut assemblies. By combining them in varying sequence, each size gives numerous load-carrying possibilities.
Stock sizes in high-carbon steel or stainless steel are manufactured to your specifications
We have several size dies available. Please call, fax or e-mail if you don't see a size you need.
Stainless Steel 300 Series
1050 Spring Steel
1074 Spring Steel
1095 Spring Steel
Per Customer Specifications
S = Stainless Steel