Retaining rings are standardized machine components used for axially securing elements such as bearings, gears, and washers on shafts or inside bores. Depending on the application, they are mounted either on a shaft (external rings) or in a bore (internal rings).
▸ DIN 471 – External Retaining Rings for Shafts
Designed to be mounted in a groove on a shaft, these rings prevent axial movement of components. Common in mechanical assemblies, transmissions, and hydraulic systems.
▸ DIN 472 – Internal Retaining Rings for Bores
Used to retain parts inside housings or bores. These rings are inserted into a groove machined inside a cylindrical hole.
▸ DIN 7993B – Spiral Retaining Rings (Axial Sealing)
Used primarily for sealing and axial positioning in dynamic or rotating applications. Their spiral shape allows for uniform radial pressure and good sealing properties.
Key Features:
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Manufactured from spring steel, stainless steel, or phosphated materials
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Available in metric sizes (in accordance with DIN standards)
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Suitable for static and dynamic applications
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Easy installation and removal using circlip pliers or special tools
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Widely used in mechanical engineering, automotive, hydraulics, and pneumatics
