Precision for Life: Engineering the Future of Medical Technology
HERSHEY delivers custom compression, torsion, extension, spiral, and wire-form springs designed to meet the strict durability, stability, and safety requirements of modern automotive systems.
- ISO 13485 Certified
- 0.03mm Micro-Precision
- Medical-Grade Cleanliness
Industry Overview
In the medical field, every component is mission-critical; "Zero Failure" is the only acceptable standard. The industry faces unique challenges: the miniaturization of surgical tools, strict biocompatibility for implants, and the need for non-magnetic/corrosion-resistant properties in diagnostic equipment. Standard industrial springs simply cannot compete.
Medical Solutions & Customization Capabilities
Hershey Spring understands the rigor of medical manufacturing. We utilize medical-grade materials (316L/316LVM Stainless Steel, Titanium, Cobalt Alloys) and leverage advanced CNC technology to achieve 0.03mm micro-precision. All medical orders undergo specialized passivation and ultrasonic cleaning processes to ensure a burr-free, oil-free, and contaminant-free finish. We deliver high-fatigue life components that seamlessly integrate into the most demanding global supply chains.
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 springs, dental chair adjustment springs, medical ventilator valve springs.
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.