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Helical Tension Spring Component – Machinery and Equipment Manufacturing

Component Specifications

Definition

A helical tension spring is a coiled mechanical spring designed to operate under tensile loads, where it elongates when force is applied and returns to its original length upon release. It typically features hooks or loops at both ends for attachment, and is engineered to provide linear force-displacement characteristics within its elastic limit. These springs are critical in applications requiring controlled tension, energy absorption, or return force in mechanical assemblies.

Working Principle

The working principle is based on Hooke's Law, where the spring elongates proportionally to the applied tensile force within its elastic range. When tension is applied, the coils separate, storing potential energy in the form of elastic deformation. Upon release, the stored energy is converted back to kinetic energy, returning the spring to its original length, provided the stress remains below the material's yield strength.

Materials

Typically made from high-carbon steel (e.g., ASTM A227), stainless steel (e.g., AISI 302/304 for corrosion resistance), music wire (ASTM A228), or alloy steels. Material selection depends on factors like load requirements, environmental conditions (e.g., moisture, temperature), and fatigue life.

Technical Parameters

End Types Full loop, half loop, or machine hooks
Free Length 10-500 mm
Spring Rate 0.1-100 N/mm
Maximum Load Up to 5000 N
Coil Diameter 5-200 mm
Wire Diameter 0.5-20 mm

Standards

ISO 10243, DIN 2097

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Helical Tension Spring.

Parent Products

This component is used in the following industrial products

Tension Spring Assembly

A mechanical assembly consisting of a tension spring and its mounting hardware designed to store and release energy through extension.

View Product Details

Engineering Analysis

Risks & Mitigation

Over-extension beyond elastic limit causing permanent deformation
Fatigue failure from cyclic loading
Corrosion in harsh environments reducing lifespan
Improper hook design leading to stress concentration and breakage

FMEA Triads

Trigger: Excessive tensile load beyond rated capacity
Failure: Plastic deformation or fracture of the spring
Mitigation: Design with safety factors, use load limiters, and specify materials with high yield strength.

Trigger: Cyclic loading at high frequencies
Failure: Fatigue cracking and eventual breakage
Mitigation: Apply shot peening for surface compression, select fatigue-resistant materials, and design for lower stress amplitudes.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

±10% on spring rate, ±2% on dimensions as per ISO 10243

Test Method

Tensile testing per ASTM E8, fatigue testing per ISO 12106, and dimensional checks using calipers or optical comparators.

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the difference between a tension spring and a compression spring?

Tension springs are designed to operate under pulling forces, elongating when loaded, and typically have hooks for attachment. Compression springs work under pushing forces, shortening when loaded, and often have plain ends. Their load directions and end configurations differ fundamentally.

How do I calculate the spring rate for a helical tension spring?

The spring rate (k) is calculated using the formula: k = (G * d^4) / (8 * D^3 * N), where G is the shear modulus of the material, d is the wire diameter, D is the mean coil diameter, and N is the number of active coils. This determines the force required per unit of elongation.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Helical Tension Spring