Canted Coil Springs: Consistent Force for High-Performance Applications

In applications where consistent load, low friction, and reliable performance are critical, traditional spring designs often fall short. Canted coil springs—also known as slant coil or wire-wound springs—offer a proven solution, delivering nearly constant force across a wide deflection range without yielding. Their unique geometry makes them ideal for demanding sealing, electrical contact, and connection applications across multiple industries.

At MW Components, decades of spring manufacturing experience and deep application knowledge help engineers select and customize canted coil springs for precise performance requirements. From standard stainless steel options to specialty alloys and custom welded configurations, MW Components supports both standard and highly engineered spring solutions.

Why Choose Canted Coil Springs

Canted coil springs are designed to provide predictable, repeatable force over a broad range of compression. Because each coil is angled relative to the spring axis, the load is distributed evenly across the spring, reducing stress concentration and extending service life.

Key advantages include:

• Nearly constant load over a wide deflection range
• Minimal hysteresis and near-zero compression set
• Low friction, ideal for dynamic or high-speed motion
• Excellent fatigue resistance under repeated cycling
• Reliable performance in tight-tolerance applications

These characteristics make canted coil springs a preferred choice where performance consistency and longevity matter.

Light, Medium, and Heavy Load Options (000–500 Series)

MW Components offers a broad range of canted coil spring cross-sections, typically spanning the 000 through 500 series, with additional sizes available upon request. Each series is available in light (L), medium (M), and heavy (H) load variants, allowing engineers to adjust load performance without changing the spring’s outer envelope.

• Light Load: Best suited for low-force sealing, sensitive components, and applications where minimal friction is required
• Medium Load: A balanced option for general-purpose sealing, connectors, and moderate dynamic movement
• Heavy Load: Designed for low-pressure and light gas sealing, aggressive environments, and applications requiring increased contact force or high current carrying capacity.

This flexibility allows designers to fine-tune spring performance while maintaining consistent cavity dimensions.

Material Options and Specialty Alloys

Standard canted coil springs are commonly produced from 302 or 316 stainless steel, offering a strong balance of corrosion resistance, strength, and lead time. For more demanding environments, MW Components can supply canted coil springs in a variety of specialty materials, including:

• Beryllium copper for electrical conductivity and non-magnetic applications
• Nickel-based alloys such as Inconel® for high-temperature environments
• Other specialty alloys selected to meet corrosion, fatigue, or chemical resistance requirements

Additional coatings and surface treatments are also available to further enhance wear resistance, corrosion protection, or electrical performance.

Pre-Cut and Welded vs. Continuous Springs

Canted coil springs can be supplied in continuous lengths or as pre-cut and laser-welded springs, depending on application needs. Pre-cut and welded springs are often required when:

• A defined dash size or seal groove dimension is specified
• Assembly speed and repeatability are critical
• The spring must fit precisely within a closed cavity or seal jacket

MW Components produces cut and welded radial or axial springs for standard industrial and metric dash sizes across the 000–400 series. For non-standard applications, engineers can provide the centerline of the spring groove, and MW will manufacture a spring energizer to exact specifications.

High-Speed, Low-Friction Sealing Performance

Canted coil springs are widely used in spring-energized seals, where they are paired with polymer jackets such as PTFE or UHMWPE. In these applications, the spring maintains continuous sealing force while allowing smooth rotary or reciprocating motion.

This design excels in:

• High-speed dynamic sealing applications
• Low-friction environments
• Systems with pressure fluctuations, wear, or minor misalignment

By compensating for tolerance changes and wear over time, canted coil spring-energized seals help extend equipment life and reduce maintenance.

Common Industries and Applications

Medical

In medical applications, canted coil springs provide precise, repeatable force for critical components such as quick connect/disconnect mechanisms, electrical connectors, and spring-energized seals. They are commonly used in surgical instruments, diagnostic equipment, infusion pumps, and ventilators, where cleanliness, reliability, and consistent performance are essential.

Canted coil springs are also effective in EMI/RFI shielding applications, helping protect sensitive medical electronics from interference that could disrupt device performance or data integrity.

Aerospace

Aerospace applications rely on canted coil springs for their reliability, fatigue resistance, and ability to perform under extreme environmental conditions. Common uses include sealing systems, electrical contacts, and vibration-resistant connectors where consistent load and long service life are required.

Oil & Gas

In oil and gas environments, canted coil springs are frequently used as spring-energized seals in valves, pumps, compressors, and downhole tools. Their ability to maintain continuous contact under high pressure, temperature extremes, and corrosive conditions helps prevent leaks and ensures system integrity under dynamic operating conditions.

Engineering Early for Optimal Performance

To maximize the benefits of canted coil springs, engineers are encouraged to engage with MW Components early in the design process. Key considerations include load requirements, available deflection, operating temperature, environmental exposure, speed of motion, and assembly constraints. These factors guide the selection of spring series, load rating, material, and weld configuration.

With in-house engineering support, custom tooling capabilities, and short lead times on standard configurations, MW Components is positioned to deliver canted coil spring solutions tailored to your application’s performance and reliability requirements.

Request a quote or ask an MW expert to get started.