Do You Know Canted Coil Spring/Slant Coil/Wire Wound Spring?

Customized canted coil spring

　　Canted Coil Spring is also called Slant Coil Spring, Wire Wound Spring, Wound Spring, Slant Coil, Slant/Canted Coil Spring. It can transmit strong current in a small space, and can also be used as pure mechanical connection. It has no limitation in use and is suitable for use in a variety of static or dynamic medium and high voltage environments.
The size of the spring finger and the number of independent coils make the spring suitable for various electrical contact designs, and the maximum contact point is the best current carrying capacity for electrical or EMI shielding. Each coil will independently compensate for contact and surface changes, which allows for a wider tolerance between fittings. Multiple contact points increase conductivity, and its operating temperature is relatively low, so its service life is longer.

　　Spring finger technology is used for power contact in various industries, including medical electronics, medical devices, aerospace and national defense, energy and automobile, etc.

technical parameter

To customize the finger spring, you need to provide the following necessary parameter information:
Wire diameter D: mm	(Note: diameter of spring wire)
Spring inner diameter di:mm	(Note: inner diameter of ring spring)
Major diameter  w: mm	(Note: major axis of oblique circle ellipse)
Small diameter  H: mm	(Note: minor axis of oblique circle ellipse)
For customized finger spring, you also need to provide the following technical requirements:
Total number of turns:	(Note: total number of coils with inclined coil)
Material requirements:	(for example: beryllium copper C17200, C17500, chrome zirconium copper c18500, stainless steel SUS304, 316… Etc.)
Surface treatment:	(Note: copper plating, nickel plating, silver plating, gold plating, etc.)
Spring outer diameter:	(Note: outer diameter of ring spring)
Other requirements:	(such as: Spring usage, current requirements, shaping flatness requirements, welding requirements and others)

Canted Coil Spring has the following characteristics

• The structure is simple, the volume is small, the material is less, the cost is low; Meet the space of device design
• Small size requirements, suitable for compact design; The minimum number of components simplifies the design of connecting devices.
• Multi point contact and high concentrated force can realize almost lossless contact. Large current carrying capacity is ensured; Good conductivity, high electric and thermal stability.
• The contact pressure of each contact point is not high, and the silver plating layer has good wear resistance during the opening and closing operation.
• The unique structure makes it have a wide range of work; Large tolerance is allowed on the joint surface; It has great adaptability to machining error and assembly error, and is more suitable for large-scale production.

Canted Coil Spring Materials used

• Spring contact refers to the main use of high voltage switch electrical contact. The products provided in domestic market can be divided into three types: high conductivity beryllium bronze CuCo2Be (C17500), high-strength beryllium bronze cupe2 (C17200), chromium zirconium copper CrZrCu (c18150).
  
• High conductivity beryllium bronze cuco2b (C17500) is selected as the representative of ABB company in foreign countries and Institute of metals, Chinese Academy of Sciences in China.
  
• Some manufacturers in China choose high strength beryllium bronze cube2 (C17200) to produce spring finger.
  
• CrZrCu (c18150) is selected by a manufacturer in the United States.

Canted Coil Spring application

• High and medium voltage switch
• Bus connector
• High current connector
• Fixed pole
• High voltage cable end piece
• Fuse connector
• Mechanical and electronic applications