5 Mistakes to Avoid When Choosing Stainless Steel Constant Force Springs for Medical Equipment
Why Medical Equipment Demands "Higher Standards" for Constant Force Springs
Medical equipment (e.g., insulin pens, surgical retractors) relies on constant force springs for precise, repeatable motion—even a tiny force deviation or material contamination could risk patient safety. This is why medical-grade springs must meet stricter standards than industrial ones, such as 316L stainless steel compliant with ASTM A240 and RoHS environmental requirements.
However, many buyers still make mistakes when selecting springs, leading to delayed projects or increased costs. Below are the 5 most common pitfalls and how to avoid them.
Mistake 1: Choosing 304 Stainless Steel Instead of 316L
Why it’s wrong: 304 stainless steel meets general corrosion resistance needs but cannot withstand frequent disinfection with strong chemicals (e.g., ethanol, hydrogen peroxide) used in medical settings. 316L, with a lower carbon content (≤0.03%) and added molybdenum, resists corrosion from disinfectants.
Mistake 2: Ignoring Force Deviation Tolerance
Why it’s wrong: Medical devices like insulin pens require force deviation ≤±3% to ensure accurate drug delivery. Choosing a spring with a ±5% deviation (the industry’s “general standard”) could lead to underdosing or overdosing.