Spring manufacturers produce elastic components that store energy and provide a restoring force or torque. A spring supplier may manufacture these parts, distribute them, or combine catalog sales with custom production. The right choice depends on spring type, working loads, material, order volume, and inspection requirements.
This guide compares ten spring manufacturing companies and supplier brands, including MW Components, Lee Spring, NHK Spring, and Lesjöfors. Start with the comparison table, then check the relevant product line against your drawing. A company that supplies automotive suspension springs may serve a very different purchasing need from a catalog compression spring supplier.
How This Spring Manufacturer List Was Compiled
The entries cover published stock and custom spring offerings, automotive spring systems, and industrial components. Company descriptions were checked against official product and capability information in October 2026. The numbering is for navigation; it is not a ranking by market share, measured quality, or delivery performance.
MW Components and Century Spring are listed separately because buyers may encounter their different sales channels, but Century Spring is part of MW Components. This is a list of ten companies and brands, not ten independent corporate groups. LILY Bearing also supplies springs, so this article is a commercial sourcing guide rather than an independent supplier audit.
Minimum order quantities, prices, lead times, and certifications depend on the part, facility, and order. Obtain written confirmation for your project. Published capabilities do not establish that a supplier is qualified for a particular aerospace, medical, or nuclear application.
Spring Manufacturers and Suppliers: Quick Comparison
10 Spring Manufacturing Companies and Supplier Brands
1. MW Components — Custom Springs and Specialty Materials
MW Components offers stock and custom springs through multiple manufacturing operations. Its product scope includes coil springs and other engineered spring components for industrial applications.
For unusual materials, identify the specific operation responsible for the quotation. Its Engineered Spring Products operation publishes capabilities in alloys including Inconel, Elgiloy, MP35N, titanium, and beryllium copper. Confirm the required grade, product form, heat treatment, and inspection scope rather than assuming every facility offers the same processes.
2. Lee Spring — Catalog Springs and Custom Designs
Lee Spring supplies stock and custom compression, extension, and torsion springs, along with other spring and formed-metal products. Catalog selection is useful when a standard design can meet the required force and installation envelope.
Compare load at working length, allowable travel, material, and end configuration before selecting a catalog number. Check actual stock and the delivery date for the destination; catalog availability does not guarantee a fixed arrival time.
3. KENENG — Custom Springs and Related Hardware
KENENG publishes manufacturing capabilities for custom springs, fasteners, CNC-machined parts, and metal stampings. It is a candidate when a project requires springs alongside other custom hardware.
Request separate acceptance criteria for each component and identify who controls assembly dimensions. Buying from one supplier does not automatically reduce tolerance accumulation. Ask for a drawing review, samples, and a quotation based on the actual batch size.
4. NHK Spring — Automotive Suspension and Precision Springs
NHK Spring manufactures automotive suspension springs and precision spring products. Its published spring range includes compression, tension, torsion, and formed-wire springs.
For automotive spring manufacturers, distinguish suspension components from small precision springs at the start of the enquiry. Ask which business unit and production site would handle the part, and confirm programme qualification, validation testing, and supply arrangements.
5. Newcomb Spring — Custom Springs and Wire Forms
Newcomb Spring manufactures custom compression, extension, and torsion springs, as well as wire forms and other metal forms. It also publishes micro-spring capabilities.
Provide the drawing and identify the functional characteristics that need inspection. If load or torque is critical, request the relevant test method and acceptance limits. Machine type alone is not evidence that a supplier can hold a particular tolerance on your part.
6. Mubea — Automotive Spring Systems and Disc Springs
Mubea offers automotive coil spring systems, composite components, and disc springs. These are distinct product families, so the appropriate enquiry route depends on the application.
For a vehicle programme, discuss the complete spring system, installation, corrosion protection, and validation requirements. For a disc spring application, specify force, deflection, available space, and stack arrangement. Composite material is not a direct substitute for steel without a design review.
7. Lesjöfors — Industrial Springs and Pressings
Lesjöfors supplies stock and custom springs, gas springs, wire forms, and pressings. It publishes application information for industries including energy, automotive, and general engineering.
Identify the product team and manufacturing location suited to the project. For sustainability requirements, request documentation covering the quoted material and part. A group-level environmental initiative does not establish the carbon footprint of every spring it sells.
8. Century Spring — Stock and Custom Springs within MW Components
Century Spring offers stock and custom spring products and is part of MW Components. Its catalog can be useful for industrial maintenance, replacement searches, and designs that can accept a standard spring.
For replacement work, compare the original specification with the proposed part rather than matching appearance alone. If purchasing policy requires independent sources, MW Components and Century Spring should not automatically count as two independent supplier groups.
9. Acxess Spring — Online Selection and Custom Quoting
Acxess Spring provides stock and custom spring options together with online spring design and quoting tools. Its digital tools cover compression, extension, and torsion spring design.
Use the calculated design as a starting point for review. Confirm the drawing revision, material, working range, and quoted inspection scope before ordering. An online calculation or instant price does not by itself validate fatigue life in the assembled mechanism.
10. Diamond Wire Spring — Cold-Wound Springs and Wire Forms
Diamond Wire Spring publishes capabilities for cold-wound compression, extension, torsion, and die springs, as well as wire forms. Its range includes both standard industrial spring configurations and custom requirements.
For heavy-duty springs, confirm the wire size, forming process, stress limits, and testing for the specific design. Do not assume that a heavy-duty product is hot-wound or that it cannot take a permanent set. The company’s published compression spring information specifically describes cold-wound products.
How to Choose a Spring Supplier for Your Application
Stock Springs or Custom Spring Manufacturing?
Start with a catalog search when the installation dimensions and working loads have some flexibility. Custom manufacturing becomes more useful when a standard part cannot meet the required force, travel, material, end shape, or documentation.
The product family also matters. Compression springs resist an axial push. Extension springs resist a pull and require attention to hook or loop stresses. Torsion springs deliver torque through angular movement. Die springs are heavy-duty compression springs commonly used in tooling; confirm the specified load and travel rather than selecting by color alone.
Define Performance at the Working Positions
Free length and outside diameter do not fully define a spring. For a compression spring, specify the forces at the installed and maximum working positions. Include limits on solid height, guidance, and clearance. For a torsion spring, define the torque at stated angles and the loading direction.
Illustrative RFQ example: a compression spring must produce 20 N at a length of 30 mm and 40 N at 20 mm. Its required average rate between those positions is (40 − 20) / (30 − 20) = 2 N/mm. This calculation does not establish allowable stress, solid height, fatigue life, or whether the response remains linear outside that interval.
State the acceptance tolerance for each load point separately. If a designer chooses ±10% for this example, the acceptance bands would be 18–22 N and 36–44 N. These are illustrative project limits, not universal spring manufacturing tolerances.
Match the Supplier to Material, Volume, and Service Conditions
For high-volume OEM spring production, review production capacity, approved samples, change control, and repeat-order consistency. For small batches, compare tooling charges and inspection costs as well as the unit price. Ask suppliers to quote against the same drawing and delivery terms.
Specialty-alloy enquiries should state the exact grade and service conditions. Titanium, beryllium copper, and nickel alloys are not interchangeable. Confirm material availability, manufacturing experience, heat treatment, and supporting material records for the chosen facility.
Spring Manufacturers for Energy and Renewable Equipment
MW Components and Lesjöfors both publish energy-sector capabilities. Mubea lists disc spring applications in oil production equipment. These are starting points for an enquiry, not evidence of approval for every energy application.
For wind, solar, power generation, or petrochemical equipment, specify the actual mechanism, load cycle, temperature range, corrosive media, and required life. For sustained loads at elevated temperature, include an allowable force-loss or relaxation requirement. For nuclear work, verify the applicable project qualification and documentation requirements before approving a supplier.
Compare Inspection Evidence, Not General Precision Claims
Ask for inspection results tied to the characteristic that controls function: load at length, torque at angle, diameter, or another drawing requirement. Confirm the measurement equipment, test procedure, sampling plan, and batch identification.
Process capability indices can support repeat-production assessment, but they require suitable data and a stable process. The NIST process capability guide explains this basis. Agree any Cpk target with the customer; a single threshold is not an automatic acceptance rule for every spring or order.
Material certificates support traceability, but they do not prove finished-part fatigue performance. Where service life matters, define the test load range, frequency, environment, sample count, and failure criteria before comparing test results.
What to Include in a Spring RFQ
Drawing or catalog number, drawing revision, units, and spring type.
Installation envelope, end configuration, guidance, and clearance requirements.
Force at specified lengths, or torque at specified angles, with acceptance limits.
Maximum travel, load cycle, target life, temperature range, and operating environment.
Material grade, finish, heat treatment, and traceability requirements.
Prototype quantity, production batch size, annual demand, and delivery destination.
Inspection reports, application-specific approvals, and sample approval requirements.
You can compare available product families in the LILY Bearing spring range. For a specification review, contact us with the drawing and operating requirements.
Frequently Asked Questions
Can I cut a stock compression spring to obtain the required length?
Cutting removes coils and changes the spring rate as well as the end condition. It can also affect seating and stability. Request a suitable stock part or an approved custom design instead of assuming a shortened spring will retain its original load characteristics.
Are die spring color codes interchangeable between suppliers?
Not necessarily. Color may identify a load series within a particular catalog or standard, but it does not replace the part specification. Check the governing standard, dimensions, load at working deflection, and permitted travel before substituting a different brand.
How should metric and inch spring quotations be compared?
Compare every dimension and load in a single unit system. One inch is exactly 25.4 mm, while one pound-force is approximately 4.44822 N. Spring rate requires both conversions: 1 lbf/in is approximately 0.175127 N/mm. Preserve the original tolerances during conversion and avoid rounding them into a different acceptance range.
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