Retaining ring | AISI 420 | DIN 471
Retaining ring DIN 471 AISI 420 in stainless steel is intended for use in mechanical systems where secure axial locking is required. The product meets the DIN 471 standard and is used where external mounting on a shaft with high strength and good dimensional stability is crucial. It is suitable for professional applications in the manufacturing industry and mechanical engineering where precise fit and operational reliability are important requirements.
AREA OF APPLICATION
The product is used in industrial manufacturing, mechanical engineering, and mechanical systems. It is intended for applications where axial locking of components on a shaft is required and where the stainless material provides protection against wear and moderate corrosive impact.
TECHNICAL SPECIFICATIONS
Product type: Retaining ring
Product family: External retaining ring for shaft
Material class: AISI 420
Strength class: Not specified
Standard: DIN 471
Design: External for shaft
Surface finish: Untreated
Environment: Indoor / Outdoor
Delivery unit: Piece
FREQUENTLY ASKED QUESTIONS (FAQ)
What is a DIN 471 retaining ring used for?
A retaining ring for shafts according to DIN 471 (also called an external circlip or Seeger ring) is installed in a turned groove on an external shaft. Its main function is to create a secure axial lock that prevents components such as bearings, gears, pulleys, and bushings from sliding out of position along the shaft.
Why is this stainless steel retaining ring made of AISI 420 (1.4034/1.4116) stainless steel?
Unlike common austenitic stainless steels (such as A2/AISI 304 or A4/AISI 316), AISI 420 is a martensitic stainless steel that can be hardened. This gives the retaining ring the spring elasticity, high hardness, and high yield strength required for the ring to be expanded during installation and subsequently return to its original shape while maintaining clamping force, all while providing good corrosion protection.
How is the retaining ring installed correctly and what is required for proper function?
Installation is most easily performed with a dedicated circlip plier for external rings. The tips of the pliers are inserted into the retaining ring's two assembly holes to carefully expand the ring so that it can be guided over the shaft and snapped into the groove. For maximum operational reliability, it is important that the shaft groove has the correct width and depth according to the DIN 471 standard and that the ring is not over-expanded during installation.