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Retaining rings are installed on a shaft or a bore / housing to secure assemblies, components or machinery parts. Raptor Supplies offers retaining rings from brands like Smalley, Grainger, Fabory and Rotor Clip. The exposed surface of the retaining ring acts as a shoulder to retain the component, withstand the forces associated with it and prevent unwanted movement of the mated components.
Broadly classified, they are available in two variants: external and internal retaining rings.
Rotor Clip E-Style Retaining Rings:
Smalley Spiral Retaining Rings::
Rotor Clip Poodle Retaining Rings:
Texas Pneumatic Tools Retaining Rings:
Have external / internal prongs that grip the shaft or housing bore for a secure fit. Also called grooveless retaining rings or self-locking retaining rings.
The distance between the inside & outside diameter and the clearance around their circumference remains consistent. Also called speared-end or low-clearance retaining rings.
Semi-flexible rings featuring ears with holes that require an installation tool.
Can be slid into an external shaft groove and locked using a built-in clip-on tab. The tab can be lifted for removing the rings from the shafts.
The most basic coiled, flat rings with no gap or protruding ears for easy installation.
Feature two identical, interlocking halves that install radially in external shafts. The halves have prongs that interlock to latch into the shaft's groove.
E-style rings with a three-pronged design for a tight fit. Available in two variants: bowed retaining rings and poodle retaining rings. The former has a bowed / curved design to act like a spring and exert pre-load compressive force on the shaft assembly, while the latter has 'ears' for a larger retaining surface to handle stronger forces.
For 360-degree closure, place the rings on the shaft grooves and squeeze the tabs using pliers. For removing them, similarly squeeze the tabs on the opposite side. Also known as X-washers.
Refers to heat treatment for darkening retaining rings to help them blend in with dark machinery or backgrounds.
More durable than zinc plating, specially in marine environments. Toxic in nature.
Better adhesion and lower corrosion resistance than zinc plating in dry environments.
Provides mild to high corrosion resistance in wet environments. Available in variants like zinc yellow-chromate plating & zinc-chromate plating.
Acts as a coating base to protect the paint's adhesion and prevent corrosion from spreading in dry environments.
Done on stainless steel retaining rings to prevent corrosion by removing free iron & creating a protective oxide layer.
Provides wear protection & mild corrosion resistance. Can be used as an undercoat for coatings like chromium owing to its superior adhesion properties.
Also known as black luster. Provides greater corrosion resistant than zinc-plated finish in wet environments.
Electrical conductivity & non-magnetic properties
Moderate hardness, rigidity, reduced bendability & magnetic properties
Provides elasticity for stretching / compressing according to the shaft / bore diameter
Lightweight, non-magnetic construction and cheaper to use than any other material
Corrosion resistance & mild magnetic properties
Yes, retaining rings are also called snap rings.
An internal retaining ring fits into housing or bore, whereas an external retaining ring fits over or around a shaft or pin.
Most retaining rings or snap rings can be removed and reused multiple times without any issue, provided that the stress generated during installation is kept minimal. However, selected models of snap rings like self-locking retaining rings get permanently locked with the shaft / housing and cannot be removed without breaking or warping the ring out of specified tolerances.