What John Evans' Sons does

John Evans' Sons LLC, founded in 1850 in Lansdale, Pennsylvania, operates as a specialty precision spring manufacturer under the trade identity "America's First Springmaker." The company produces a diversified portfolio of engineered spring components and sub-assemblies, including constant force springs, spiral torsion springs, power springs, helical springs, wire forms, stampings/flat springs, spring reels, helical shock and vibration isolators, torsion leaf springs, variable force springs, and motor brush springs, with documented capabilities extending to micro springs as thin as 0.002 inches and helical springs using wire down to 0.004 inches in diameter. Manufacturing is consolidated at a 65,000-square-foot facility with in-house tooling, CNC machining, stamping/forming, heat treating, laser etching, and turnkey mechanical assembly operations.

The company's go-to-market is enterprise field sales targeting regulated, specification-driven OEMs in medical devices, aerospace, defense, and industrial sectors, supplemented by a stock distribution partnership with Stock Drive Products for smaller-volume purchases. Customer relationships are anchored by named engagements with Boeing, Lockheed Martin, Bombardier, Mitsubishi Aircraft Corporation, Goodrich, Stryker, Medtronic, IBM, General Electric, Siemens, and the U.S. Department of Defense, with additional verticals in window balance, electric motors, robotics, point-of-purchase merchandising, trucking, elevator technology, and HVAC/data center cooling. Revenue is generated through one-time hardware sales of custom and standard spring components and engineering services tied to RFQ-driven projects, with no public pricing or self-service e-commerce channel. The company states 175+ years of continuous operation, ISO 9001:2015, ISO 13485:2016, and AS9100 certifications, AAMA qualification for window balance products, and inclusion of its constant force springs in NASA's Mars rovers Curiosity and Perseverance.

John Evans' Sons LLC is a privately held Pennsylvania LLC with no disclosed parent, subsidiaries, venture or private equity backing, or M&A activity. Its longevity, independent ownership posture, and reference to itself as a "small business" indicate bootstrapped, organically grown operations. Financials, headcount, and revenue are not publicly disclosed; pricing is quote-based and conducted through an RFQ system. The company is actively operating, with a second shift underway and career postings for skilled machine operators.

Name

John Evans' Sons

Legal name

John Evans' Sons LLC

Website

https://springcompany.com

Company type

Private

Founded year

1850

Operating status

Operating

Headcount range

51–100 employees

Short description

John Evans' Sons LLC is a privately held, ISO/AS9100-certified precision spring manufacturer founded in 1850 in Lansdale, PA, producing constant force, helical, spiral torsion, and micro springs plus mechanical assemblies for medical device, aerospace, defense, and industrial OEMs.

Ownership category

akta.pro rank

Headquarters

HQ city

Lansdale

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Precision Spring Components: Manufacturing and sale of custom and standard precision springs including constant force springs, spiral torsion springs, power springs, helical springs, wire forms, stampings/flat springs, spring reels, shock & vibration isolators, torsion leaf springs, variable force springs, and motor brush springs. Revenue generated through one-time product sales and custom engineering projects for manufacturers.
2. Custom Mechanical Assemblies: Turnkey assembly services incorporating springs, wire forms, stampings, shafts, pistons, tubing, seals, bearings, machined components, and molded plastic parts. Streamlines production for customers requiring complete assemblies or sub-assemblies.
3. Engineering Services: Custom design services, in-house tooling, prototyping, and technical consultation to support spring and assembly development.

Go-to-market motion2 records

Distribution channels2 records

Marketing channels10 records

Core offering

John Evans' Sons is a precision spring manufacturer founded in 1850 that designs and produces constant force springs, spiral torsion springs, power springs, helical springs, wire forms, flat stampings, spring reels, shock and vibration isolators, torsion leaf springs, and motor brush springs. The company operates a 65,000 sq ft manufacturing facility in Lansdale, PA, and serves OEMs across medical, aerospace, defense, and industrial markets with custom-engineered spring components and mechanical assemblies.

Product overview

John Evans' Sons is America's First Springmaker (established 1850) offering precision-engineered spring solutions as a diversified product portfolio. The core product lineup centers on various spring types including Constant Force Springs, Spiral Torsion Springs, Power Springs (Clock Springs), Helical Springs (compression, extension, torsion), Wire Forms, Stampings/Flat Springs, Spring Reels (open and enclosed), Shock & Vibration Isolators, Torsion Leaf Springs, PUSHER Variable Force Springs, and Motor Brush Springs. These are complemented by specialized capabilities including Custom Mechanical Assemblies (combining multiple component types into turnkey solutions) and Micro Springs (precision miniature springs as thin as 0.002"). The company serves diverse industries including medical devices, aerospace, defense, window manufacturing, electric motors, robotics, point-of-purchase displays, trucking, elevator technology, and HVAC systems. All products are manufactured under ISO 9001:2015, ISO 13485:2016, and AS9100 quality management systems at the company's 65,000-square-foot facility in Lansdale, PA.

Differentiator

Problem solved

Functional benefit

Brands

• SideLoad™: Constant force balance spring series with SideLoad™ and Drop-In Series, AAMA qualified for window applications.
• Di Flex 500
• PUSHER Variable Force Springs

Products and services

• Constant Force Springs
• Spiral Torsion Springs
• Power Springs
• Helical Springs
• Wire Forms
• Stampings and Flat Springs
• Spring Reels
• Shock and Vibration Isolators
• Torsion Leaf Springs
• PUSHER Variable Force Springs
• Motor Brush Springs
• Mechanical Assemblies
• Prototype Capabilities

Quantifiable outcome

• Over 100 million high performance window balance products produced as world leader in constant force spring technology
• +2 more outcomes

Named customers11 records

Segments10 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Five partnerships are on record, tiered core and minor.

• American Architectural Manufacturers Association (AAMA)coreOthersJohn Evans' Sons LLC is a member of AAMA. Constant force balance springs including SideLoad and Drop-In Series are AAMA qualified. This partnership provides industry qualification for window and fenestration applications.
• National Business Aviation Association (NBAA)coreOthersJohn Evans' Sons LLC is a member of NBAA. Constant force balance springs are widely used in aerospace applications, making NBAA membership strategically important for this vertical.
• Spring Manufacturers Institute (SMI)coreOthersJohn Evans' Sons LLC is a member of SMI, which serves, supports and educates North American precision spring manufacturers in their pursuit of competitiveness in global markets.
• Fenestration & Glazing Industry AllianceminorOthersJohn Evans' Sons holds FGIA certification for compliance with fenestration and glazing industry standards.
• Stock Drive ProductsminorChannel Partner/ Reseller/ DistributorStock Drive Products serves as a distributor for John Evans' Sons stock constant force springs, making standard products available through their distribution network for smaller volume customers.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Lee Spring: Long-established U.S. precision spring manufacturer offering catalog and custom compression, extension, torsion, and constant force springs. Most directly comparable peer given overlapping product breadth, custom engineering services, and similar industrial customer base.
• Associated Spring (Barnes Group): Barnes Group's spring segment is one of the largest precision spring manufacturers globally, serving aerospace, medical, defense, and industrial OEMs — directly competing with John Evans' Sons in the same regulated, high-reliability verticals.
• Century Spring: MW Industries brand offering a large catalog of stock and custom springs since 1922, including compression, extension, torsion, and constant force springs. Closest direct competitor on catalog breadth and custom-engineered spring capability.
• Smalley Steel Ring Company: Specialist in wave springs, retaining rings, and constant force springs with strong engineering and rapid-prototype services. Comparable on constant force spring technology niche and custom design support to industrial OEM customers.
• Vulcan Spring & Manufacturing: Specialty spring manufacturer producing custom constant force, power, and counterbalance springs for medical, consumer, and industrial applications. Direct peer in custom-engineered spring solutions and small-to-mid volume programs.
• Bal Seal Engineering: Manufacturer of precision springs, canted coil springs, and engineered components serving medical, aerospace, defense, and industrial OEMs. Overlaps with John Evans' Sons in precision components for regulated, mission-critical applications.
• Helical Products Company: Specialist in helical wire forms, springs, and custom metal-forming serving aerospace, medical, and industrial markets. Comparable on helical and wire-form manufacturing expertise for demanding applications.
• Roto Springs: Precision spring manufacturer producing custom compression, extension, torsion, and flat springs for industrial OEMs. Smaller-scale direct competitor focused on custom-engineered spring programs.

Broad incumbents

• MW Industries: Engineered components conglomerate owning Century Spring, Helical Products, and other spring brands. Larger, broader portfolio competitor — not niche-specialized like John Evans' Sons, but defines the upper-bound scale benchmark in the precision-spring category.
• McMaster-Carr: Massive industrial MRO supplier carrying extensive spring catalogs for immediate shipment. Indirect competitor for standard catalog springs and small-volume buyers who prefer self-service online ordering over the RFQ model.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/johnevanssons
• YouTubeyoutube.com/channel/UCjX7c0lRq8Z5cKh3Z3nYv-Q
• Facebookfacebook.com/JohnEvansSons
• LinkedInlinkedin.com/company/john-evans%27-sons
• Instagraminstagram.com/johnevanssons

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

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 John Evans' Sons