Design Engineering

Spirolox® Spiral Retaining Rings

Smalley's industry-leading Spirolox® Retaining Rings feature a gapless design with 360° of retaining surface. Unlike other rings, Spirolox has no protruding ears to interfere with mating components in your assembly! The highly versatile Spirolox rings are also groove-interchangeable with circlips, meaning they can replace circlips without any design changes. Spirolox rings are manufactured using a unique process called edgewinding, where flattened wire is coiled along the edge. Unlike stamping, this manufacturing method creates no scrap, allowing the parts to be economically produced in carbon steel, stainless steel, coppers, and many other alloys. Edgewinding also gives customers the added benefit of No-Tooling-Charges® on custom parts since this manufacturing method requires no dies to produce the parts.


Upgrade from Circlips with The Engineer's Choice® in retaining rings

Smalley's industry-leading Spirolox® Retaining Rings feature a gapless design with 360° of retaining surface. Unlike circlip retaining rings, Spirolox has no protruding ears to interfere with mating components in your assembly! The highly versatile Spirolox rings are also groove-interchangeable with circlips, meaning they can replaced without any design changes.

Spirolox rings are manufactured using a unique process called edgewinding, where flattened wire is coiled along the edge. Unlike stamping, this manufacturing method creates no scrap, allowing the parts to be economically produced in carbon steel, stainless steel, coppers, and many other alloys. Edgewinding also gives customers the added benefit of No-Tooling-Charges® on custom parts since this manufacturing method requires no dies to produce the parts.

Engineers trust Smalley's innovative parts in over 25,000 applications, including pneumatic assemblies, valves, connectors, piston pumps, gear assemblies, and pulleys. Don't just take our word for it; take a look at our product video to see how transformative these retaining rings are.



Learn about the different benefits of upgrading to Spirolox®

There's more to Spirolox® retaining rings than their noticeable difference in appearance from Circlips. Engineers across all major industries continually switch from Circlips in their applications because of the numerous benefits. Over 70% of manufacturers in the Fortune 500 list of companies rely on Smalley's revolutionizing spiral retaining rings to ensure their products are optimized to their full potential. As the world leader and inventor of the spiral retaining ring, Smalley understands many factors influence the decision to include specific components in a product design. This e-book will detail the different ways that using Spirolox rings in a design can be beneficial. Also included in the e-book is information on selecting the correct type of Spirolox ring for your application needs.



Request samples of Smalley’s Spirolox® retaining rings today!

Are you ready to see what Spirolox® retaining rings can do for your application? Smalley is more than pleased to send you and your design engineering team complimentary samples! See the differences up close and even test them on your application. Smalley stocks over 6,000 standard retaining rings in carbon steel, 302 stainless steel, and 316 stainless steel. Our retaining ring diameter sizes range from 0.250" to 16" and 6 mm to 400 mm.

Can't find the size you are looking for? Once your team has decided to implement Spirolox into your product design, our engineers can help you create a custom part! Our custom retaining rings range from .118" to 120" (3 mm to 3000 mm). The uniqueness of applications often demands a ring or spring to conform to application-specific requirements. Our No-Tooling-Cost™ process provides an economical alternative to produce a custom retaining ring or to meet your exact specifications.



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