Retaining rings, also known as circlips, are fastening elements used to secure components axially on a shaft or within a bore. They are typically made from spring steel, carbon steel, or stainless steel, offering high flexibility and durability. Internal retaining rings are applied inside a bore, while external retaining rings are mounted on a shaft to hold parts in place. The main advantage of retaining rings is that they allow for quick and secure assembly without the need for additional fasteners such as bolts or pins.
Their range of applications is extensive. They are widely used in the automotive industry (in transmission, differential,and suspension systems), in machinery manufacturing (for bearing and gear retention), in electric motors (for rotor and stator assemblies), and in the production of household appliances and small mechanical components. In addition, retaining rings are also used in hydraulic and pneumatic systems, providing secure fastening under high pressure conditions.