Precision for Life: Engineering the Future of Medical Technology
Hershey Spring delivers custom medical springs, including micro-compression, torsion, and precise wire forms. Our components are engineered to meet the strict durability, biocompatibility, and safety standards of advanced medical devices.
- ISO 13485 Certified
- 0.03mm Micro-Precision
- Medical-Grade Cleanliness
Industry Overview
In medical device manufacturing, "Zero Failure" is the only acceptable standard. Standard industrial springs simply cannot meet these strict regulatory requirements. We solve unique medical challenges, including ultra-fine surgical tool miniaturization, strict biocompatibility for implants, and non-magnetic properties for diagnostic equipment.
Medical Solutions & Customization Capabilities
Hershey Spring understands the strict rules of medical manufacturing. We use premium medical-grade materials like 316LVM surgical steel, titanium, and cobalt alloys. Using advanced CNC coiling, we achieve an elite 0.03mm micro-precision limit. Every medical spring undergoes specialized passivation and ultrasonic cleaning. This guarantees a 100% burr-free, oil-free, and clean finish for immediate clinical use.
Industry-Focused Processes
- Passivation
Removes free iron from the metal surface, forming a dense oxide layer to enhance corrosion resistance. Commonly used for stainless steel springs in medical, food, or high-humidity applications.
- Cleaning
Eliminates oil, debris, and micro-particles to ensure the quality of subsequent processes and clean delivery. Methods include ultrasonic or chemical cleaning.
- Heat Treatment
Through processes like quenching and tempering, improves spring hardness, toughness, and fatigue life, while relieving internal stresses.
- Shot Peening
High-speed beads impact the spring surface to introduce compressive residual stress, significantly boosting fatigue life and crack resistance.
- Presetting / Scragging
Compressing the spring to solid height to remove initial plastic deformation, ensuring no loss of free length or force over long-term use.
Application Coverage
- Minimally Invasive & Endoscopic Surgery
Applications: Biopsy forceps steel cables, endoscope bending control springs, stapler reset springs.
Features: Extremely fine wire diameter, ultra-high flexibility, and precise rebound.
- Drug Delivery & Life Support
Applications: Insulin pump drive springs, inhaler compression springs, precision springs for injection pens.
Features: Linear and constant force output, ensuring accurate and reliable drug delivery.
- Orthopedics & Implants
Applications: Orthopedic guide drill springs, stent delivery systems, pacemaker components.
Features: Made from biocompatible materials such as titanium alloys, corrosion-resistant, and safe for human use.
- Large Diagnostic Equipment
Applications: MRI/CT machine shock absorption, dental chair adjustment systems, and ventilator control valves.
Features: Non-magnetic design, high fatigue life, ensuring long-term stable operation of equipment.
Industry-Grade Materials
- MRI Compatibility:
Non-magnetic Titanium or Cobalt Alloys (Elgiloy/Phynox) to ensure complete safety in MRI environments.
- Biocompatibility & Corrosion Resistance:
Springs made from 316LVM (Vacuum Melted Surgical Steel) with passivation, preventing corrosion from body fluids.
Durability & Reliability Enhancements
- Presetting / Scragging
Compressing springs to solid height to eliminate initial plastic deformation, ensuring zero free-length loss over time—critical for ventilator valves.
- Shot Peening
Surface treatment using ceramic or glass beads to dramatically enhance fatigue strength, suitable for cardiac assist devices requiring millions of cycles.
Mechanical/Functional Customization Options
- Custom shapes and sizes to fit compact medical devices.
- Constant or non-linear force profiles for precise control.
- Biocompatible and corrosion-resistant materials like 316LVM, Titanium, or Elgiloy.
- Non-magnetic options for MRI-safe applications.
Qualification Certification Obtained
FAQ
We possess top-tier micro-processing capabilities for minimally invasive surgery applications. Minimum Wire Diameter: Down to 0.03mm (approximately 1/3 the diameter of a human hair), ideal for vascular guidewires and endoscope components.
Tolerances: Critical dimensions for precision micro-springs are controlled within ±0.005mm to ±0.01mm, ensuring consistency during microscopic assembly.
We ensure lifespan through a 3-dimensional system of Material + Process + Testing:
Material: Imported medical-grade materials with high fatigue strength, such as 316LVM (vacuum melted stainless steel) or cobalt alloys.
Process: Shot Peening and Pre-setting eliminate internal stresses, preventing length loss or fracture during long-term use.
Testing: Our in-house lab performs simulated fatigue tests ranging from 1 million to 10 million cycles, providing detailed test reports for verification.
We strictly adhere to medical cleanliness standards. Post-production, springs undergo multi-stage ultrasonic cleaning and passivation to remove machining oils and micro-burrs. Packaging is conducted in a clean environment using medical-grade anti-static bags or blister trays to ensure oil-free, dust-free, and debris-free delivery.