Wave Springs
It is a spring made from coiled flat wire with waves added to give it the property of being flexible. Wave springs are designed to reduce the operating length of a spring while still providing the same force as a longer spring which not only saves space in use but also because less material is used to produce the springs.

We can summarize the advantages of wave springs as follows:

• The axial height of the wave spring can be reduced by up to 50% from that of a conventional spring. As a result, it saves space for use and is lightweight.
• Wave springs still provide the same force and deflection as conventional coils or compression springs.
• Wave springs can be designed to be used in the socket or shaft of equipment.
• The wave spring can adjust itself to be centered in the device cavity.
• Wave springs can be made to be hard or soft using wire diameter factors, wire pattern, number of turns, winding pattern, number of waves, and waveform.

Types of wave springs are divided into:
1) Single Turn Wave Spring
    1.1 Gap Type Single Turn Wave Spring
    1.2 Overlap Type Single Turn Wave Spring
    1.3 Closed Type Single Turn Wave Spring
2) Multi-Turns Wave Spring
    2.1 Plain Ends Multi-Turns Wave Spring
    2.2 Shim Ends Multi-Turns Wave Spring
3) Nested Wave Spring
4) Linear Wave Spring
5) Extended Wave Spring
6) Interlace Wave Spring
7) Round-Section Wire Wave Spring