Custom Springs from China: Leading Suppliers & Factory for All Your Spring Applications
Custom Spring Design and Engineering Support
SMS Spring understands the value of well qualified engineering support when designing custom springs. Our engineers provide assistance every step of the way from design conception through project completion. Our customer design team has all the necessary resources your project needs. Contact us for expert engineers for technical support on your custom spring project.
Global Custom Spring Manufacturing
SMS Spring's expanding global presence and knowledge of the worldwide marketplace puts SMS Spring at the leading edge of creating market specific solutions for customers' needs. Contact SMS Spring for design assistance or to answer any questions to help start your custom spring project.
Regulatory and Compliance
🏅
SMS Spring is ISO 2015:9001 certified and RoHS compliant.
Application
SMS Spring offers support for every stage of custom design, manufacturing and distribution:
Application/Concurrent Engineering staff
Proof of concept methodologies
Regulatory expertise including RoHS and REACH
Proprietary integrated quality control system
State of the art computerized spring testing equipment
Global supply chain network for both production and distribution
CAD assisted product design, drawing and modeling
In-house prototype production services
In-house tooling production including EDM
Pull/Kanban capabilities
Ongoing Customer/Supplier improvement initiatives
ISO 9001 Registered Quality Management System
Factories outfitted to effectively accommodate both short and long production runs
Extensive experience working with Aerospace/Military Specifications (AS9100), Automotive Specifications (TS16949)
Blanket agreement and consignment inventory management capabilities
Description
From Start to Finish, SMS Spring Has the Custom Capabilities You Need!
| Spring Type | Specifications |
|---|---|
| 🔵 Compression Springs |
Outside Diameter: 0.025" – 5.75" / 0.64mm – 146.1mm Wire Diameter: 0.004" – 0.625" / 0.10mm – 15.88mm |
| 🔵 Extension Springs |
Outside Diameter: 0.025 – 5.75" / 0.64 – 146.1mm Wire Diameter: 0.005" – 0.625" / 0.13mm – 15.88mm |
| 🔵 Torsion Springs |
Outside Diameter: 0.025 – 5.75" / 0.64 – 146.1mm Wire Diameter: 0.005" – 0.187" / 0.13mm – 4.75mm |
| 🔵 Wave Springs |
Outside Diameter: 0.200" – 5.000" / 5.08mm – 127mm Inside Diameter: 0.150" – 4.54" / 3.81mm – 115.32mm |
| 🔵 Constant Force Springs |
Min. Outside Diameter: 0.340" / 8.636mm Inside Diameter: 0.280" – 1.97" / 7.11mm – 50.04mm Min Length: 11.80" / 299.72mm |
Distinct Production Capabilities
Plastic Compression Springs, Drawbar Springs, Cone Springs, Double Torsion Springs, Extension Springs with Swivel Hooks
Wire Forms
Wire Diameters: 0.010" – 0.240" / 0.25mm – 6mm | Maximum Finished Length: 60" / 1524mm
Stampings: Strip Width: up to 3" / 76.20mm | Strip Thickness: 0.005 to 0.062" / 0.13mm – 1.57mm
Stampings: Strip Width: up to 3" / 76.20mm | Strip Thickness: 0.005 to 0.062" / 0.13mm – 1.57mm
Secondary Operations and Finishing
Assembly, Color Coding, Electropolishing, Grinding, Heat Treating, Looping, Passivation, Powder Coating, Shot Peening, Spring Setting
Plating: Nickel, Zinc, Cadmium, Special Finishes (e.g., Black Oxide)
Plating: Nickel, Zinc, Cadmium, Special Finishes (e.g., Black Oxide)
Materials
Beryllium Copper, Beryllium Copper Silver Coated, Carbon Steel (Hard Drawn), Carbon Steel (Oil Tempered), Chrome Silicon (Oil Tempered), Chrome Vanadium (Oil Tempered), Elgiloy®*, Hastelloy®**, Inconel®† 600 / 718 / x750, Music Wire, Phosphor Bronze, Plastic Composites, Stainless Steel 300 Series, Stainless Steel 17-7
Please Inquire Regarding Other Materials
Elgiloy is a trademark of Elgiloy Ltd. Partnership. Hastelloy is a registered trademark of Haynes International Inc. Inconel is a registered trademark of Special Metals Corporation.
Frequently Asked Questions
Q
What types of custom springs does SMS Spring manufacture?
▸
SMS Spring manufactures a wide range of custom springs including compression springs, extension springs, torsion springs, wave springs, constant force springs, wire forms, and stampings. They also support distinct production types such as cone springs, drawbar springs, and double torsion springs.
Q
Is SMS Spring ISO certified and compliant with international standards?
▸
Yes. SMS Spring is ISO 9001:2015 certified and RoHS compliant. The company also has extensive experience working with Aerospace/Military Specifications (AS9100) and Automotive Specifications (TS16949).
Q
What engineering support does SMS Spring provide for custom spring design?
▸
SMS Spring offers full engineering support from design conception through project completion. This includes CAD-assisted design, in-house prototype production, application/concurrent engineering staff, proof of concept methodologies, and regulatory expertise including RoHS and REACH.
Q
What materials are available for custom spring manufacturing at SMS Spring?
▸
SMS Spring works with a broad range of materials including Beryllium Copper, Carbon Steel (Hard Drawn and Oil Tempered), Chrome Silicon, Chrome Vanadium, Elgiloy®, Hastelloy®, Inconel® 600/718/x750, Music Wire, Phosphor Bronze, Plastic Composites, and Stainless Steel (300 Series and 17-7). Custom material inquiries are also welcomed.
Q
What finishing and secondary operations does SMS Spring offer?
▸
SMS Spring provides a comprehensive range of secondary operations including assembly, color coding, electropolishing, grinding, heat treating, looping, passivation, powder coating, shot peening, spring setting, and plating (Nickel, Zinc, Cadmium, and special finishes such as Black Oxide).
Q
Does SMS Spring support both small and large volume production runs?
▸
Yes. SMS Spring's facilities are specifically outfitted to accommodate both short and long production runs. They also offer Pull/Kanban capabilities, blanket agreement support, and consignment inventory management to meet diverse customer demand levels.



















