Reliable Retention
Secure components in assemblies with proven retaining ring solutions
About Retaining Rings & Snap Rings
Innovative Retention Solutions. Proven Performance. Smalley helps engineers optimize space, simplify assembly, and achieve reliable performance.
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Smalley is a global leader in retaining ring design and manufacturing, with over 6,000 standard retaining rings and extensive custom capabilities. Known for inventing the Spirolox® spiral retaining ring, Smalley pioneered the edgewinding process and continues to set the standard for retaining ring innovation. As a retaining ring manufacturer for over 100 years, Smalley offers a comprehensive product portfolio that includes spiral retaining rings, constant section rings (snap rings), self-locking rings, tapered section rings (circlips), Hoopster® low-profile retaining rings, WaveRings®, and laminar seal rings. Each ring type offers unique performance characteristics to address specific retention, installation, and application requirements.
Unlike traditional die-stamped circlips and retaining rings, Smalley's Spirolox® spiral retaining rings and Constant Section retaining rings are edgewound from pre-tempered flat wire. This unique manufacturing method produces parts with Circular-Grain® metallurgy, resulting in greater strength than conventional stamped rings. Spirolox retaining rings feature a uniform cross-section with No Ears to Interfere®, maximizing usable space within an assembly and eliminating interference with mating components. Their edgewound design also facilitates installation and removal without special tools. The material efficiency of the edgewinding process also makes exotic materials a cost-effective option. Smalley retaining rings are available as internal retaining rings for housings and external retaining rings for shafts.
Key Advantages
360° Groove Engagement
Gapless, full-circle contact improves load distribution and retention performance
No Ears to Interfere®
Spirolox rings feature an ear-free design to ensure no interference with mating components in your assembly.
Easy Installation
Select retaining ring series install and remove without the need for specialty tools.
Customization Options
Tailored solutions to meet your specific design and load requirements.
Product Categories
Hoopster Retaining Rings
Ideal for thin-walled cylinders with minimal radial projection and shallow groove depth.
Laminar Seal Rings
Labyrinth-style metallic seals for protection against contamination and corrosive environments
Revolox Self-Locking Rings
Engineered for high rotational speeds beyond conventional retaining ring limits.
Spirolox Retaining Rings
360° load distribution and no protruding lugs in a flat-wire, spiral-wound design.
Tapered Section Circlips
The traditional retaining rings you're used to, built for high thrust loads.
WaveRings
Retaining rings that combine retention and spring functions in a single component.
Solutions for Every Application
Smalley stocks over 6,000 standard retaining rings in carbon steel and stainless steel (302 and 316), available in sizes from 0.250 to 16" and 6 to 400 mm. For unique application requirements, we offer custom retaining rings in diameters ranging from 0.118 to 120" and 3 to 3000 mm.
With over 40 material options and No-Tooling-Costs™, custom solutions are both simple and cost-effective. Backed by multiple ISO certifications and flexible packaging options, we can support a wide range of quality and supply chain requirements. Free samples of standard parts are available for application testing and validation.
Retaining Ring Applications in Your Industry
From aircraft systems and automotive transmissions to robotic surgical instruments, Smalley retaining rings help engineers solve assembly challenges across a wide range of industries. Their versatile designs support everything from emerging technologies to everyday products like the car you drive.
Lightweight, reliable retaining rings help secure critical components in aircraft systems and precision aerospace equipment.
Exotic material retaining rings withstand harsh environments, corrosion, and extreme operating conditions.
Retaining rings secure bearings, gears, transmissions, and clutch assemblies while supporting efficient assembly and serviceability.
Small-diameter stainless steel retaining rings for surgical instruments, implantables, and diagnostic equipment.
Heavy-duty retaining rings withstand shock and impact loading in construction and agricultural equipment.
Retaining Ring Application Examples
