Constant Force Springs Vulcan Spring is a leading designer and manufacturer of constant force springs, also called constant tension springs. Conforce is Vulcan Springs brand name for its constant force spring, a brand that is well known and highly respected for quality throughout the world. Conforce constant force springs: Offer high force output with very small space requirements Provide long linear reach with minimal force buildup Store power indefinitely when extended Custom Constant Force Springs Vulcan Spring specializes in making custom constant force springs to customer specification. With Vulcan Springs design, engineering and manufacturing prowess, custom springs can be produced in almost the same time as stock springs. Custom is normal for Vulcan Spring and this has been proven to customers over and over again. How to Work with Vulcan Spring for Custom Constant Force Springs Vulcan Spring works with our clients at various stages of their product development process with DFM (design for manufacturing) principles. We are design experts with over 40 years' experience in designing and delivering cost effective products in volume. In addition, Vulcan offers a broad range of fully engineered springs from our extensive portfolio of products. The design and engineering process includes: Initial Design Review Prototyping - usually about 10 to 20 prototype springs Testing Production - Short run or long run production Technical Considerations for Constant Force Springs Constant force springs are typically specified and engineered with the following in mind: