Constant Force Spring Manufacturing Process: Materials, Forming & Quality Control
Constant force springs are widely used in industrial equipment, automation systems, cable balancers, and medical devices, where stable force output and long service life are essential. Understanding the constant force spring manufacturing process helps buyers choose a reliable supplier.
Raw Material Selection for Constant Force Springs
The first and most critical step in manufacturing a constant force spring is raw material selection. Different materials require different forming techniques and directly affect spring performance.
At SEME Spring Factory, we mainly use:
High-yield stainless steel strip (such as SS301 / SS304)
Carbon steel strip for cost-sensitive applications
These materials provide excellent elasticity, fatigue resistance, and consistent force output.
Spring Width and Forming Machine Selection
The width of the spring strip determines which spring forming machine is used. SEME operates multiple precision spring forming machines to meet different design requirements.
Spring width ≤ 35 mm: formed using standard precision forming machines
Spring width ＞ 35 mm: formed using customized large-size forming machines
This classification ensures accurate coil shape, stable torque, and uniform force throughout the spring’s working stroke.
Special Processing Techniques for Performance Enhancement
For demanding applications, additional processes are applied during production, including:
Oil soaking, improving lubrication and reducing friction
High-temperature baking, enhancing anti-rust performance and fatigue life
These treatments are especially important for constant force springs used in long-cycle or high-load environments.
Mass Production and Quality Control
Producing constant force springs for mass production requires strict quality control at every stage—from material inspection to forming, heat treatment, and final testing.
With advanced equipment, skilled technicians, and a complete production line, SEME hardware Spring Factory supplies custom flat coil constant force springs with stable quality and competitive pricing to customers worldwide.
Reliable Constant Force Spring Manufacturer in China
SEME specializes in manufacturing custom constant force springs, flat spiral springs, and stainless steel constant force springs for various industries. OEM and ODM services are available based on drawings or samples.
Contact us today to discuss your constant force spring requirements and receive a fast quotation.
