1. What Is a Retaining Ring? A retaining ring (circlip) is a small fastening component used to prevent parts from sliding axially along a shaft.It’s commonly seen in motors, gears, and bearings — essential for keeping machines running smoothly. However, depending on the region or industry, retaining rings follow different design and dimension standards.Globally, the three most recognized systems are JIS (Japan), DIN (Germany), and ANSI (United States). Let’s explore the key d

Self-Locking Retaining Ring When people hear Self-Locking Nut (SPN / Press-Fit Nut, Self-Locking Retaining Ring), they often assume it has internal threads like a conventional nut—but that’s not the case. It is actually a threadless elastic retaining ring that locks onto the shaft by its own spring force. Compared with traditional nuts, it is thinner, space-saving, and quick to install, especially suitable for applications where the shaft has no threads but still requires an

When installing C-type retaining rings (circlips / retaining rings), relying on bare hands or non-specialized tools can lead to slipping, ring deformation, or even rings flying off and causing injury. Dedicated installation tools are essential for both efficiency and safety. Whether for tiny electronics or large machine bearings, the right tool makes installation easier and more stable. --- How to choose the right tool size The most important reference is the ring’s size and