INDUSTRY COMPONENT

Closing Spring

A closing spring is a mechanical component that stores and releases energy to return a mechanism to its closed or resting position.

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Component Specifications

Definition
A closing spring is a type of compression or torsion spring specifically designed for operating mechanisms, providing the necessary force to ensure reliable closure or return motion in mechanical systems. It functions as an energy storage device that accumulates potential energy when compressed or twisted and releases it to actuate the closing action.
Working Principle
The closing spring operates on Hooke's Law (F = kx), where force is proportional to displacement. When the operating mechanism is opened or activated, the spring is compressed or twisted, storing elastic potential energy. Upon release, this energy is converted back to kinetic energy, generating force to return the mechanism to its closed position.
Materials
Typically made from high-carbon steel (ASTM A228/A229), stainless steel (AISI 302/316), or alloy steel (ASTM A401). May include coatings like zinc plating, powder coating, or passivation for corrosion resistance.
Technical Parameters
  • Free Length 50-200 mm
  • Spring Rate 10-50 N/mm
  • Maximum Load 100-500 N
  • Wire Diameter 2-10 mm
  • Operating Temperature -40°C to 120°C
Standards
ISO 10243, DIN 2095

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Closing Spring.

closing spring compression spring operating mechanism mechanical spring return spring industrial springs spring specifications Closing Spring in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Operating Mechanism

The mechanical assembly responsible for opening and closing the contacts of a main circuit breaker.

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Engineering Analysis

Risks & Mitigation
  • Fatigue failure due to cyclic loading
  • Corrosion in harsh environments
  • Over-compression leading to permanent set
  • Incorrect installation causing misalignment
FMEA Triads
Trigger: Material fatigue from repeated compression cycles
Failure: Spring fracture or loss of elasticity
Mitigation: Use high-cycle-life materials, apply shot peening, and design within safe stress limits.
Trigger: Exposure to corrosive chemicals or moisture
Failure: Corrosion-induced weakening or breakage
Mitigation: Select corrosion-resistant materials (e.g., stainless steel) and apply protective coatings.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±10% on spring rate, ±2% on free length per ISO 10243
Test Method
Compression testing to verify load-deflection characteristics, fatigue testing per ASTM E606

Buyer Feedback

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Frequently Asked Questions

What is the main function of a closing spring?

The main function is to provide consistent return force to close or reset a mechanical mechanism after it has been opened or activated.

How do I select the right closing spring for my application?

Consider factors like required force (spring rate), space constraints (free length and compressed length), environmental conditions (material and coating), and cycle life. Refer to standards like ISO 10243 for guidance.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Clip Body Closure Element