# John Evans' Sons, LLC

This MFR.ID profile was supplied, reviewed, and approved by John Evans' Sons, LLC. Originally approved on 7/29/2026; last updated 7/29/2026. Capability data is manufacturer-approved for public sourcing and RFQ use.

## Profile Links

- Canonical profile: https://mfr.io/springcompany
- JSON data: https://mfr.io/springcompany.json

## Company Overview

Founded in 1850 and now part of Beijer Components, with Lesjöfors serving as a core commercial spring brand, John Evans’ Sons engineers and manufactures constant-force, spiral torsion, power, helical, and flat springs, wire forms, and spring-powered reels from a modern 65 000-ft² Lansdale, PA plant. Certified to ISO 9001:2015, AS9100D, and ISO 13485:2016, the in-house tool-and-die shop, CNC machining, EDM, and heat-treating enable rapid prototype-to-production turnaround (3–8-week standard lead times). Buyers in medical devices, aerospace, industrial automation, fenestration, robotics, automotive, retail displays, and heavy equipment rely on JES for tight-tolerance springs, full design support, and global logistics reaching 100+ countries.

## Quick Reference

- Processes: Spring Wire Forming, Helical Wire Rope Isolators, Spring Assembly & Integration, Micro Spring Coiling, Rapid Spring Prototyping & Design Engineering
- Materials: Steel, Stainless Steel, Alloy Steel, (SK85) SK5 Carbon Steel, 301 Stainless Steel, 302 Stainless Steel, 303 Stainless Steel, 310 Stainless Steel, 316 Stainless Steel, 304 Stainless Steel
- Lead Time: 3-8 Weeks
- Production Scale: Prototype (1-20 parts), Short Run (21-1000 parts), Medium Run (1001-100000 parts), Mass Production (100001-10000000 parts), Prototype (1-5 assemblies), Short Run (6-500 assemblies), Medium Run (501-10000 assemblies), Mass Production (10001+ assemblies), Prototype (1-10 parts), Short Run (11-500 parts), Medium Run (501-10000 parts), Mass Production (10001+ parts), Short Run (20-500 parts)
- Location: Lansdale, Pennsylvania 19446
- Employees: 51-100
- Revenue: $25M-$40M
- Founded: 1850
- Contact: sales@springcompany.com - +1 215-368-7700
- Verified: Manufacturer Approved

## Capabilities

### Precision Spring & Wire Forming

John Evans’ Sons produces custom helical, flat‑strip and constant‑force springs plus complex wire forms by combining multi‑axis CNC coiling, progressive die/fourslide stamping and proprietary strip‑coiling equipment. Round‑wire diameters from 0.004 in – 0.236 in (0.10 mm – 6.00 mm) and strip gauges 0.002 in – 0.170 in thick by up to 4.0 in wide cover micro medical springs through large industrial counterbalances. In‑house tool‑and‑die, vacuum/atmosphere heat‑treat, end grinding, shot peen, passivation, electropolish and a full menu of polymer, phosphate and black‑oxide coatings deliver springs ready for aerospace, medical and industrial service. Closed‑loop vision feedback, force/torque SPC and certified quality systems (ISO 9001:2015, AS9100 D, ISO 13485:2016) ensure every spring meets dimensional, load and life targets from single prototypes to 100‑million‑piece programs.

- Process: Spring Wire Forming
- Highlights: CNC coiling & multislide wire forming: Ø 0.004 – 0.236 in round wire or shaped wire, Progressive/fourslide strip forming: 0.002 – 0.170 in thick × ≤ 4 in wide for constant‑force, power & flat springs, Force output from 0.01 in‑oz to 125 ft‑lb (laminated constant‑force packs) and torsional outputs to 700 in‑lb, Integrated age‑hardening, stress‑relief, shot peen (6–10 A) & electropolish (Ra ≤ 0.25 µm) extend >10⁶‑cycle life, Lot‑traceable load/torque & fatigue testing with AS9102 FAI, PPAP and digital travellers on request
- Subprocesses: Spring Wire Forming, CNC Spring Coiling, Constant/Variable-Force Strip Spring Forming, Flat Spring Progressive Stamping, Laser / Waterjet Blanking (Springs), Heat-Treating & Thermal Processing, Spring End Grinding, Spring Passivation & Electropolishing, Spring Shot Peening, Powder & Polymer Coatings (Springs), Black Oxide & Phosphate Conversion Coatings (Springs), Engineering & Design Services, Hardness & Tensile Coupon Testing, Inventory Management & Logistics
- Specifications:
  - Typical Lead Time: 2-8 weeks - 2–4 weeks for repeat stainless SKUs; 6–8 weeks when custom tooling or exotic alloy sourcing required.
  - Quality Certifications: ISO 9001:2015, AS9100D, ISO 13485:2016, AAMA qualified (window balance springs) - Lot traceability, AS9102 FAI and medical device DHR supported.
  - Flat Strip Thickness Capability: 0.002-0.625 in (0.05-15.9 mm) - 0.002–0.032 in for constant/power springs; up to 0.625 in for heavy leaf and latch springs.
  - Supported Materials: Music wire (ASTM A228), Chrome-silicon & oil-tempered steels, 301/302/304/316 SS, 17-7 PH SS, Inconel 600/718, Hastelloy, Monel, Elgiloy, Havar, titanium alloys, Phosphor bronze, beryllium copper - Material selected for strength, corrosion, temperature, conductivity or fatigue per application.
  - Force / Torque Capacity: 0.00005-125 ft-lb (0.00007-169.5 N·m) - Micro constant-force springs at 0.01 in-oz through multi-laminated strip springs delivering 125 ft-lb; spiral torsion up to 700 in-lb fits within this range.
  - Flat Strip Width Capability (Coiled & Stamped): 0.062-4 in (1.6-102 mm) - Constant-force and power springs use 0.062–4.0 in strip; stamped flat springs run 0.125–2.0 in widths in progressive dies.
  - Production Scale: Prototype (1-20 parts), Short Run (21-1000 parts), Medium Run (1001-100000 parts), Mass Production (100001-10000000 parts) - Kanban & VMI programs ensure just-in-time delivery.
  - Testing & Process Controls: Vision SPC on coil diameter, free length & strip profile, Load / torque testers 0 – 10 000 N (±0.5 %), Rotary & linear fatigue rigs to 10⁶+ cycles, Rockwell hardness & eddy-current temper verification, Digital travellers, AS9102 FAI & PPAP documentation - Closed-loop machine control adjusts in real time when SPC trends drift.
  - Round Wire Diameter Capability: 0.004-0.236 in (0.1-6 mm) - CNC coilers and multi-axis benders handle micro medical springs to stout industrial coils.

### Helical Shock & Vibration Isolators

John Evans' Sons manufactures all-metal helical isolators from aircraft-grade stainless steel wire rope wound into a helix and secured with metal retaining bars. Designed for multidirectional shock and vibration protection, the isolators operate in compression, tension, shear, and roll across all axes and support loads from a few pounds to thousands. Standard and custom configurations serve shipboard, vehicle, aircraft, shipping-case, industrial, ordnance, medical, and chimney applications.

- Process: Helical Wire Rope Isolators
- Highlights: Aircraft-grade stainless steel wire rope secured by metal retaining bars, Published Coulomb damping of 15-17% of critical (C/Cc), Protection in compression, tension, shear, and roll across all axes, Cable diameters from 1/16 in to 1 in and larger support loads from a few pounds to thousands, Maintenance-free all-metal construction with standard and custom configurations
- Materials: Steel, Stainless Steel, Alloy Steel
- Specifications:
  - Construction: Aircraft-grade stainless steel wire rope, Metal retaining bars, All-metal helical configuration - The published design winds stainless steel wire rope into a helix and secures it with metal retaining bars.
  - Published Coulomb Damping: 15-17% of critical (C/Cc) - This is the damping range published for John Evans' helical shock and vibration isolators.
  - Published Cable Diameter Range: 1/16 in to 1 in and larger - The product page states cable diameters from 1/16 in to 1 in+.
  - Published Load Range: A few pounds to thousands of pounds - Actual selection depends on cable diameter, configuration, frequency range, and installation footprint.
  - Isolation Modes: Compression, Tension, Shear, Roll, All-axis protection - The product page explicitly describes multidirectional protection in these modes.
  - Design & Finish Options: Iridited aluminum retaining bars (standard), Stainless steel retaining bars on request, Other coatings or materials on request, Custom cable configurations - Custom cable configurations can be tailored to load capacity, frequency range, and installation footprint.
  - Published Application Categories: Shipboard, Rough-terrain vehicles, Aircraft, Shipping cases, Industrial equipment, Ordnance equipment, Medical equipment, Chimneys and scrubbers - These categories are listed in the product-page application table.

### Turnkey Mechanical Spring Assemblies

John Evans’ Sons delivers complete spring-based sub-assemblies – from brush-spring packs to large counterbalance mechanisms – integrating CNC-machined, stamped, welded and heat-treated components in-house. A single PO secures design support, custom fixturing, precision machining, certified welding/brazing and 100 % functional testing under ISO 9001/AS9100/ISO 13485 oversight, reducing supply-chain risk and time-to-market for aerospace, medical and industrial equipment OEMs.

- Process: Spring Assembly & Integration
- Highlights: One-stop spring + hardware assembly with machining, stamping, EDM, welding and heat-treat under one roof, Component mix can include springs, wire forms, shafts, pistons, seals, bearings and molded plastics, Force / torque outputs from 0.01 in-oz to 125 ft-lb; cycle life tested to 1 000 000+ cycles, Custom jigs & fixtures built internally for repeatable alignment and preload, End-of-line functional, force and life-cycle testing with full traceability
- Subprocesses: CNC Milling, Deep Drawn Stamping, Welding & Joining, Surface Grinding, Light Mechanical Assembly, Heat-Treating & Thermal Processing, Wire EDM, Fixture & Gauge Manufacture, Hardness & Tensile Coupon Testing, Value Added Services, Engineering & Design Services, Inventory Management & Logistics
- Materials: (SK85) SK5 Carbon Steel, 301 Stainless Steel, 302 Stainless Steel, 303 Stainless Steel, 310 Stainless Steel, 316 Stainless Steel, Alloy Steel, Stainless Steel, Steel
- Specifications:
  - Quality Certifications: ISO 9001:2015, AS9100D, ISO 13485:2016 - QA monitors every assembly stage; FAI, PPAP and lot traceability available on request.
  - Testing & QA Coverage: Force / torque verification at specified deflection, Life-cycle endurance (up to 1 M cycles), CMM / optical dimensional audits, Hardness & tensile coupon testing - Assemblies destined for aerospace/medical sectors include full documentation package and serialized traceability.
  - Typical Lead Time (New Assembly): 4-12 weeks - Dependent on custom tooling and external component sourcing; repeat orders ship in as little as 2 – 4 weeks.
  - Integrated Component Types: Springs (constant force, spiral torsion, power, helical), Wire forms & flat stampings, CNC-machined shafts, pistons, brackets, Tubing, seals, bearings & molded plastics - Typical assemblies combine 3 – 12 components; customer-supplied parts are accepted for turnkey build.
  - In House Joining & Finishing Processes: TIG / MIG welding, Silver brazing, Swaging & coining, Surface & cylindrical grinding, Deburr, tumble & vibratory finish, Passivation, zinc/tin plating, phosphate coat - Eliminates outside processing delays and maintains dimensional control on critical mating surfaces.
  - Production Scale Supported: Prototype (1-5 assemblies), Short Run (6-500 assemblies), Medium Run (501-10000 assemblies), Mass Production (10001+ assemblies) - Historical programs include 100 M+ window balance spring assemblies.
  - Force / Torque Capacity: Min: 0.01 in-oz, Max: 125 ft-lb (0.00007-169.5 N·m) - Laminated or multi-spring configurations achieve high torque while micro brush-spring packs deliver gram-level forces.
  - Validated Cycle Life: 2500-1000000 cycles - Cycle life verified on dedicated rigs; mid-stroke operation dramatically extends life expectancy.

### Precision Micro Spring Manufacturing

John Evans’ Sons produces ultra-miniature compression, extension and flat springs from wire or strip as thin as 0.002 in (0.05 mm). CNC micro-coilers with laser-monitored feedback, in-line stress relief and in-house tooling deliver repeatable geometry at scale, while ISO 9001/13485/AS9100 quality and 100 % optical inspection ensure reliable parts for medical, aerospace and micro-electronic devices.

- Process: Micro Spring Coiling
- Highlights: Forms wire/strip down to 0.002 in (0.05 mm) for true micro components, 8-axis CNC coiling with closed-loop laser OD & pitch control, In-house micro tooling, heat-treat, passivation and plating streamline iterations, 100 % optical/laser dimensional inspection with full traceability, Prototype-to-million-piece scale under ISO 13485 & AS9100 oversight
- Subprocesses: Ultra-Fine Wire & Strip Forming (Micro), Micro Spring Stamping, Micro Tooling Design & Build, Micro Component Heat-Treatment & Stress Relief, Micro Optical/Laser Dimensional Inspection, Rapid Spring Prototyping & Design Engineering, Micro Spring Material Selection & Consulting, Micro Spring Assembly & Integration, Micro Component Passivation & Conversion Coatings, Clean-Room Micro-Part Packaging & Handling
- Materials: 301 Stainless Steel, 302 Stainless Steel, 303 Stainless Steel, 304 Stainless Steel, (SK85) SK5 Carbon Steel, Alloy Steel, Stainless Steel, Steel
- Specifications:
  - Quality Certifications: ISO 9001:2015, ISO 13485:2016, AS9100D - Certified quality systems support aerospace, medical and other regulated programs.
  - Typical Lead Time (Prototype): 2-6 weeks - Internal tooling and material inventory enable 2–6 week turnaround for new micro-spring designs; repeat orders ship faster.
  - Supported Spring Materials: 300-series stainless steels, 17-7 PH stainless, Phosphor bronze, Music wire (high-carbon steel), Elgiloy / cobalt alloys, Inconel & other nickel alloys - Engineers advise on strength, biocompatibility and corrosion resistance for each micro-scale application.
  - Wire / Strip Thickness Capability: 0.002+ in (0.05+ mm) - Ultra-fine forming down to 0.002 in enables reliable miniature springs for compact mechanisms.
  - Production Scale Supported: Prototype (1-10 parts), Short Run (11-500 parts), Medium Run (501-10000 parts), Mass Production (10001+ parts) - Automated lines and flexible staffing scale the validated micro-spring process from one-off to millions.
  - Inspection Coverage: 100 % optical comparators, Laser OD & pitch monitoring, Microscope dimensional checks - Every micro spring is verified against critical dimensions and force/deflection curves for traceable quality assurance.

### Rapid Spring Prototyping & Design Engineering

John Evans’ Sons turns napkin sketches into production-ready springs fast. Certified engineers perform DFM/RFQ feasibility reviews, create digital spring models with finite-element stress and fatigue analysis, fabricate custom prototype tooling in-house, and coil or stamp trial parts from wire/strip as fine as 0.002 in. Iterative design loops—with complete load, deflection and life-cycle data—converge on an optimised geometry that scales seamlessly to pilot and mass production under ISO 9001, AS9100D and ISO 13485 controls.

- Process: Rapid Spring Prototyping & Design Engineering
- Highlights: DFM & simulation cut first-article iterations by 50 %+ versus legacy methods, Prototype tooling built in ≤3 days with CNC, EDM and additive fixture inserts, Wire diameters 0.002–0.125 in and strip 0.002–0.170 in × ≤2.5 in wide supported, Comprehensive test lab: force/torque (±0.5 %), fatigue to 10⁶ cycles, failure analysis, Prototype kits (3–10 force variants) ship in 1–4 weeks; same team scales to millions
- Subprocesses: DFM / DFA Consulting, Prototype Tooling Design & Build, Spring Wire Forming, Alloy & Temper Guidance, Spring Load / Deflection & Fatigue Testing, Multiple-Variation Spring Prototype Kits, Inspection Reporting, Spring Failure Analysis & Design Troubleshooting, Prototype-to-Production Lot Management
- Specifications:
  - Supported Prototype Materials: Music wire (SAE 1074/1095), 300-series stainless (301, 302, 304, 316), 17-7 PH stainless, Inconel 600 / 718, Elgiloy cobalt alloy, Phosphor bronze, beryllium copper - Small-lot stock of common alloys plus rapid sourcing for exotic grades; side-by-side material trials offered.
  - Testing & Validation Services: Static load & deflection curves (0–10 000 N), Rotary & linear fatigue rigs to 10⁶ cycles, High-speed video & optical micro-inspection, Root-cause failure analysis with SEM fractography - Complete data packets (PDF + CSV) provided for design reviews, FAI and regulatory submissions.
  - Typical Lead Time: 1-4 weeks - 1–2 weeks for simple round-wire prototypes in stocked alloys; 3–4 weeks if custom strip tooling or exotic material procurement is required.
  - Simulation & CAD Tools: Spring Calculator Professional® (rate & stress), ANSYS® / FEA for complex flat springs, SolidWorks® & STEP/IGES native import - Digital twins predict load ±3 % and life ±10 % before metal is cut, reducing physical iterations.
  - Prototype Dimension Capability: 0.002-0.17 in (0.05-4.32 mm) - Round wire 0.002–0.125 in Ø and strip 0.002–0.170 in thick (≤2.5 in wide) enable micro medical springs through heavy constant-force bands.
  - Prototype Batch Size Options: Prototype (1-20 parts), Short Run (20-500 parts) - Multi-variation kits (3–10 force or length variants) available in a single shipment.
  - Documentation Deliverables: DFM review report & risk matrix, Detailed CAD drawings with tolerances ±0.0005 in where critical, Material & heat-treat certs, RoHS/REACH statements, First-Article Inspection (AS9102) on request - Digital records integrate with customer PLM; prototype learnings roll directly into production travellers.

## Certifications

- Fenestration & Glazing Industry Alliance (FGIA) Membership (Type: Membership; Authority: Fenestration & Glazing Industry Alliance (FGIA); Status: Active; Scope: Corporate membership in the Fenestration & Glazing Industry Alliance.; URL: https://fgiaonline.org)
- Northeast Window & Door Association (NWDA) Membership (Type: Membership; Authority: Northeast Window & Door Association (NWDA); Status: Active; Scope: Membership in the Northeast Window & Door Association.; URL: https://nwda.net)
- Spring Manufacturers Institute (SMI) Membership (Type: Membership; Authority: Spring Manufacturers Institute (SMI); Status: Active; Scope: Membership in the Spring Manufacturers Institute.; URL: https://smihq.org)
- National Business Aviation Association (NBAA) Membership (Type: Membership; Authority: National Business Aviation Association (NBAA); Status: Active; Scope: Corporate membership in the National Business Aviation Association.; URL: https://nbaa.org)
- FAR/DFARS Compliance (Type: Compliance; Authority: U.S. Department of Defense, U.S. Government; Status: Active; Scope: Compliance with FAR and DFARS for U.S. defense contracts.; URL: https://www.acquisition.gov/)
- RoHS 3 Compliance (Type: Compliance; Authority: European Commission; Status: Active; Scope: RoHS 3 hazardous-substances compliance.; URL: https://ec.europa.eu/environment/topics/waste-and-recycling/rohs-directive_en)
- REACH Compliance (Type: Compliance; Authority: European Chemicals Agency (ECHA); Status: Active; Scope: EU REACH chemical-safety compliance.; URL: https://environment.ec.europa.eu/topics/chemicals/reach-regulation_en)
- ITAR Registration (Type: Registration; Authority: U.S. Department of State – Directorate of Defense Trade Controls (DDTC); Status: Needs info; Scope: ITAR registration for manufacture/export of defense articles.; URL: https://www.pmddtc.state.gov)
- ISO 9001:2015 (Type: Certification; Authority: International Organization for Standardization (ISO); Status: Active; Scope: Campus site quality management system for manufacture of various types of springs and mechanical assemblies at 1 Spring Avenue; the 200 5th Street additional site is a warehouse.; Issue date: 2025-03-09; Expiration date: 2028-03-08; URL: https://www.iso.org/iso-9001-quality-management.html)
- AS9100D (Type: Certification; Authority: International Aerospace Quality Group (IAQG); Status: Active; Scope: Campus site aerospace quality management system for manufacture of various types of springs and mechanical assemblies at 1 Spring Avenue; the 200 5th Street additional site is a warehouse.; Issue date: 2025-03-09; Expiration date: 2028-03-08; URL: https://www.sae.org/standards/content/as9100d/)
- ISO 13485:2016 (Type: Certification; Authority: International Organization for Standardization (ISO); Status: Active; Scope: Manufacture of various types of springs and mechanical assemblies for non-active medical devices. The 200 5th Street additional site stores raw materials and finished product.; Issue date: 2024-12-24; Expiration date: 2028-01-02; URL: https://www.iso.org/standard/59752.html)

## Industries Served

- Aerospace & Defense: AS9100-certified constant-force and helical springs for aircraft latches, doors, and cabin systems.
- Medical Devices & Healthcare Equipment: ISO 13485-certified springs for surgical instruments, implantables, and diagnostics.
- Industrial Machinery & Heavy Equipment: Power-spring reels and flat springs for presses, conveyors, and automation cells.
- Automotive & Transportation: Custom window-balance, truck door, and seat-control springs for transportation OEMs.
- Scientific Instrumentation & Analytical Equipment: Ultra-fine springs and wire forms for spectrometers and lab automation.
- General Manufacturing: Versatile spring fabrication for diverse specialty manufacturing projects.
- Construction Products & Building Materials: FGIA-member constant-force springs and counterweights for fenestration and elevator systems.
- Industrial Robotics & Automation Systems: Compact power and torsion springs for robotic joints, grippers, and cable-management reels.
- Point-of-Purchase (POP) & Retail Displays: Spring-powered reels and flat-spring hinges for interactive retail point-of-purchase displays.
- HVAC, Climate Control & Refrigeration: John Evans' Sons manufactures constant-force, compression and extension springs, wire forms, and stamped components for airflow controls, fire dampers, seals, supports, thermal-expansion systems, and vibration-control applications in residential, commercial, and industrial HVAC equipment.
- Data Centers & Critical Facilities: John Evans' Sons manufactures constant-force and spiral-torsion springs and mechanical assemblies for data-center HVAC and fire-safety systems, including fire dampers and CRAH airflow-control equipment.

## Facilities

### John Evans' Sons Headquarters & Manufacturing Plant

65 000-ft² headquarters integrating constant-force and power-spring coilers, flat-spring presses, in-house tool-and-die, and AS9100/ISO 13485 labs; minutes from I-476 and PHL air-cargo for same-day carrier pickup.

- Type: manufacturing_facility
- Headquarters: Yes
- Email: sales@springcompany.com
- Phone: +1 215-368-7700
- Address: 1 Spring Avenue, P.O. Box 885, Lansdale, PA 19446, United States

### John Evans' Sons – 5th Street Warehouse

25 000-ft² warehouse stocking raw material and finished goods for Kanban and blanket-order programs; covered under the ISO/AS9100/ISO 13485 multi-site QMS.

- Type: distribution_center
- Phone: +1 215-368-7700
- Address: 200 5th Street, Lansdale, PA 19446, United States

## Verification Status

- Business Entity: Verified 7/10/2025
- Technical Capabilities: Verified 7/29/2026
- Locations & Facilities: Not yet verified
- Reviews & Ratings: Not yet verified
- MFR.ID Created: 6/2/2025
- Last Updated: 7/29/2026