John Evans' Sons
International leader in the design and manufacturing of constant force springs.
International leader in the design and manufacturing of constant force springs.
Located in Lansdale, PA, John Evans' Sons (ISO 9001 & ISO 13485 certified) is “America's Oldest Springmaker." We are an international leader with proven expertise in precision constant force springs, torsion springs, and spring-powered reels, utilizing advanced design and manufacturing technology. We also manufacture helical springs, vibration isolators, wire forms, stampings, and mechanical assemblies. Our capabilities include machining, forming, swaging, coining, grinding, welding, brazing, tapping, heat-treating & EDM work. Applications include aircraft & aerospace, medical devices, window manufacturing, elevators, military, trucking, electric motors, and point of purchase.
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