Metric Internal Circlip's
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Circlips
What is a Circlip? Internal vs. External Locking Rings
Circlips, also known as retaining rings or locking rings, are semi-flexible metal fasteners designed to hold components or assemblies onto shafts or within bores. They provide essential axial positioning, ensuring parts remain securely in place in mechanical systems.
Transpower Drive supplies two primary, high-durability circlip types in both metric and imperial sizes:
1. Internal Circlips (Retaining Rings for Bores)
Internal circlips are precision-engineered to fit securely within a groove inside a bore or housing, preventing the movement of components within that housing. Their design often provides superior durability and a longer service life compared to alternative fastening methods.
- Application: Securing components inside gearboxes, cylinders, or various housings.
- Design Note: They exert outward pressure within the bore groove.
- Sizing: The designated size matches the diameter of the bore itself, not the groove diameter.
2. External Circlips (Retaining Rings for Shafts)
External circlips are designed to fit tightly around a shaft, engaging with a groove on the outer diameter to provide a secure shoulder that resists axial movement of components along the shaft. A significant benefit of the external design is its ability to save space in compact assemblies.
- Application: Ideal for use on motor shafts, axles, and pin assemblies.
- Design Note: They exert inward pressure on the shaft groove.
- Sizing Example: A 20mm shaft requires a 20mm External Circlip (DIN 471 standard equivalent).
