What RPK Group does

RPK Group is a Spanish cooperative (S.COOP.) founded in 1974 in Vitoria-Gasteiz by 19 entrepreneurs, manufacturing precision springs, stamped metal parts, bus bars, and micro-components. The company operates eight or more plants across Spain, Mexico, India, and China, serving customers in automotive, medical, e-mobility, robotics, industrial, electronics, power tools, consumer goods, and eBikes. Named OEM customers include General Motors, Schaeffler, Renault, and Danfoss, with some relationships exceeding 50 years.

The company's technical capabilities span co-engineering, custom tool design, precision stamping, rolling, and assembly, supported by an in-house RPK Technological Center that uses FEA/FEM simulation. Recent product development includes micro springs with wire diameters as fine as 0.05mm for robotics and electronics, and flexible bus bars for e-mobility power distribution developed with Leartiker. Quality and sustainability credentials include IATF 16949 automotive certification, ISO 14001, CDP reporting, and EcoVadis 76th percentile positioning; the company reports 100% renewable electricity and a 90% reduction in Scope 1 and 2 emissions.

RPK operates as a member-owned cooperative, with revenue tied to manufacturing volume and long-term OEM contracts. Its business model is B2B precision component supply with co-engineering services, custom tooling, and global production. Go-to-market is direct to industrial OEMs, with regional sales coverage aligned to its manufacturing footprint. The cooperative structure distinguishes it from privately held competitors and constrains financial disclosure.

Name

RPK Group

Legal name

RPK, S.COOP.

Website

https://rpk-global.com

Company type

Private

Founded year

1974

Operating status

Operating

Headcount range

101–250 employees

Short description

RPK Group is a Spanish cooperative manufacturing precision springs, stamped metal parts, bus bars, and micro-components. Founded in 1974, it operates 8+ plants across Spain, Mexico, India, and China, serving automotive, medical, e-mobility, robotics, and industrial OEMs.

Ownership category

akta.pro rank

Headquarters

HQ city

Vitoria-gasteiz

HQ country

Spain

HQ region

Europe

Offices7 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Custom spring manufacturing: Design and manufacture of custom precision springs (compression, tension, torsion, wave, constant force, power, accordion, spiral, canted coil, and specialty springs) sold as components to OEMs and Tier 1 suppliers in automotive, medical, industrial, e-mobility, and other sectors.
2. Sheet metal stamping and bending: Precision stamped and multislide parts, dynamic strip parts, and bent metal components manufactured to customer specifications for high-complexity applications.
3. Bus bars and electrical components: Custom bus bars, flexible bus bars, and contact spring components for electrical power distribution in automotive, e-mobility, and industrial applications.
4. Value-added services and assemblies: Additional revenue from over-molding, assemblies, special packaging, product testing, cleanroom operations, and cost optimization services bundled with component supply.

Go-to-market motion3 records

Distribution channels1 record

Marketing channels12 records

Core offering

RPK Group designs and manufactures custom precision springs (compression, tension, torsion, wave, constant force, power, accordion, spiral, canted coil, micro, and arc springs), sheet metal stamped and bent parts, bus bars (including flexible variants for e-mobility), contact springs and parts, wire forms, rings and seals, and copper coils, complemented by over-molding, assemblies, and cleanroom value-added services. Products are co-engineered with customer engineering teams from prototype through high-volume serial production and sold directly to OEMs and Tier 1 suppliers in automotive, medical, e-mobility, robotics, industrial, electrical, and consumer goods sectors.

Product overview

RPK Group is a precision spring and metal components manufacturer with a comprehensive portfolio of 16 core spring and metal component products including Wave Springs, Compression Springs, Tension Springs, Torsion Springs, Canted Coil Springs, Constant Force Springs, Power Springs, Accordion Springs, Spiral Springs, Wire Forms, Arc Springs, and Copper Coils, complemented by Sheet Metal Bending/Stamping and Bus Bars. The company operates three specialized divisions: RPK Medical (for medical devices), Gasori (industrial subcontracting), and Optimus 3D (additive manufacturing). Key manufacturing capabilities include in-house tooling workshops, rolling lines, heat treatment, surface treatments, and 100% unitary control inspection. The company serves demanding industries including Automotive (IATF 16949 certified), Medical, Electric/Electronics, Industrial, E-Mobility, Power Tools, Consumer Goods, and Bike/eBike, with production facilities in Spain (Vitoria-Gasteiz, Tarragona), Mexico, India, and China.

Differentiator

Problem solved

Functional benefit

Brands

• RPK Medical: A division of RPK Group focused on springs, stamped and bent metal parts, and assemblies for medical devices, with over 50 years of experience in the spring industry and medical device sector.
• Gasori
• Optimus 3D

Products and services

• Wave Springs Precision wave springs that deliver the same force as conventional compression springs in up to 50% less axial height, ideal for space-constrained applications across automotive, medical, e-mobility, and industrial sectors.
• Compression Springs High-precision custom compression springs for storing and releasing energy, available in custom geometries and micro sizes for OEM and Tier 1 customers.
• Sheet Metal Bending and Stamping Dynamic stamped and bent strip metal parts manufactured using progressive stamping and multislide technology for demanding high-complexity applications in automotive, medical, and industrial sectors.
• Tension Springs Custom tension (extension) springs that store energy when stretched and provide precise return force for OEM applications.
• Torsion Springs Precision torsion springs designed to resist rotational forces and deliver controlled angular movement in custom mechanical assemblies.
• Canted Coil Springs Canted (slanted) coil springs providing continuous electrical contact and mechanical retention under vibration, for power distribution and electrical connectivity applications.
• Bus Bars Custom bus bars (rigid and flexible variants) for efficient power distribution in electric vehicles, e-mobility systems, and industrial electrical applications.
• Constant Force Springs Springs that deliver constant force throughout their deflection, ideal for applications requiring uniform load.
• Power Springs High-performance power springs for energy storage and controlled force delivery in demanding applications.
• Contact Springs and Contact Parts Precision contact springs and stamped contact parts for reliable electrical connections in critical automotive, e-mobility, and industrial applications.
• Accordion Springs High-stiffness accordion springs for applications requiring high force in limited space, including one-way clutch applications.
• Spiral Springs Clock springs and spiral springs for controlled energy release and precise motion in compact spaces.
• Wire Forms Custom wire forms manufactured to precise specifications for complex geometric requirements across industries.
• Rings and Seals Precision rings and seals for mechanical assemblies requiring reliable sealing and retention.
• Arc Springs Arc springs designed for specific load and deflection requirements in specialized applications.
• Copper Coils Precision copper coils for electrical applications requiring high conductivity and reliable performance.
• Micro Springs Miniature mechanical springs with wire diameters as small as 0.05 mm for medical devices, wearables, electronics, robotics, and e-mobility applications requiring precision force in minimal spaces.
• RPK Medical (Medical Device Springs and Assemblies) Specialized division providing springs, stamped parts, bending parts, and assemblies for medical devices, targeting OEM, Contract Manufacturers, and medical device engineers through cleanroom operations and over-molding.
• Engineering and Product Design Services Co-engineering services including FEA/FEM simulations, rapid prototyping, and product design to optimize spring and component performance for OEMs and Tier 1 suppliers.
• Flexible Bus Bars for E-Mobility Custom flexible bus bars designed for electric resistance, vibration, and thermal behavior objectives for e-mobility applications including electric vehicle powertrains and battery systems.
• Springs for Humanoid Robotics Precision springs and metal components designed for humanoid robotics actuators, joints, and grippers, including compression springs, wave springs, constant force springs, micro torsion springs, stamped springs, contact parts, and bus bars validated against multi-million cycle fatigue.

Quantifiable outcome

• Up to 50% axial space reduction with wave springs vs. conventional compression springs
• +6 more outcomes

Named customers7 records

Segments9 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Five partnerships are on record, tiered minor and notable.

• Hazitek R&D Support ProgramminorOthers · 1 January 2025RPK Group participates in the Hazitek business R&D support program, financed by the Basque Government and the European Union, supporting innovative industrial development projects in 2024 and 2025.
• LeartikernotableStrategic or Co-development Partner · 1 January 2024RPK Group and Leartiker conducted joint innovation on advanced bus bars for electromobility, developing overmolding and polymer welding technology for more efficient electric mobility solutions. This is a co-development partnership between two Basque technology centers/companies.
• DanfossnotableStrategic or Co-development Partner · 1 January 2024RPK India presented its advanced manufacturing expertise at Danfoss in Chennai and reinforced long-term technological collaboration with Danfoss, a major player in heating and energy efficiency solutions.
• Batera Cooperative AllianceminorStrategic or Co-development Partner · 1 January 2024RPK Group launched the Batera initiative together with five other Basque industrial cooperatives to drive a sustainable future in Álava, presenting the new website baterakoop.eus. A cooperative alliance focused on social and environmental sustainability.
• Basque Health ClusterminorStrategic or Co-development Partner · 1 January 2024RPK Group joined the Basque Health Cluster, a key step in its Strategic Plan 2023-2026 to strengthen the medical sector, connecting with other healthcare companies and institutions in the Basque Country.

Scale indicators9 records

Recent moves7 records

Expansion highlights8 records

Direct peers

• Lee Spring: US-based manufacturer of stock and custom mechanical springs including compression, extension, torsion, and wave springs. Direct competitor to RPK Group across most product categories, serving overlapping customer verticals (industrial, medical, electronics, automotive) with similar engineering customization capabilities.
• Scherdel Group: German manufacturer of technical springs, stampings, and bent wire parts serving automotive, electrical, and industrial customers. Closely comparable to RPK Group in product mix (precision springs, stampings, wire forms), customer verticals (heavily automotive-focused), and engineering customization approach.
• Smalley Steel Ring Company: US-based manufacturer of specialty retaining rings, wave springs, and constant force springs. Highly comparable to RPK Group: both specialize in wave spring technology delivering space-saving force profiles, both serve precision miniaturization applications in automotive, medical, and industrial sectors, and both compete on engineering customization and tight tolerances.
• Barnes Group (Associated Spring): Global manufacturer of precision-engineered components including springs (Associated Spring brand), serving aerospace, medical, automotive, and industrial markets. Comparable to RPK Group in product portfolio (precision springs, stampings) and customer verticals, but operates at significantly larger scale with broader geographic presence.
• Vulcan Spring & Wireform: US-based custom spring and wire form manufacturer serving medical device, automotive, and industrial customers. Highly comparable to RPK Group: both focus on custom precision springs and wire forms, both emphasize medical device and automotive verticals, and both compete on tight tolerances and miniaturization.
• Mubea: German-based global leader in automotive precision components including chassis springs, stabilizer bars, and powertrain components. Direct competitor to RPK Group in automotive spring and stamped part markets, with particularly strong overlap in European OEM supply chains for safety-critical chassis and powertrain applications.
• Muhr und Bender (Mubea Group): German precision spring and strip steel specialist serving automotive, electrical, and industrial markets. Highly comparable to RPK Group in technical capabilities (precision springs, stamped parts) and automotive Tier 1/2 supplier positioning, particularly in European OEM supply chains.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat7 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries8 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about RPK Group