Spring Selection & Design

Spring selection Spring customization Special functional springs

Compression Springs

Extension Springs

Torsion Springs

High temperature resistant springs

Corrosion-resistant springs

High frequency oscillating springs

Industry Solutions

No source force memory alloy temperature control valve

Technology Enablement

Huaxing intelligent spring design and manufacturing system

Memory alloy application development

About CATALOG

Company Introduction

Innovation Process

News

Spring Selection & Design

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Spring Selection & Design

Spring selection

Compression Springs Extension Springs Torsion Springs Wave Springs Disc Springs Rectangular Springs

Spring customization

Compression Springs Extension Springs Torsion Springs Wave Springs Disc Springs Rectangular Springs

Special functional springs

High temperature resistant springs Corrosion-resistant springs High frequency oscillating springs No magnetic springs Memory alloy springs Elgiloy springs

Industry Solutions

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Industry Solutions

Automotive Solutions New Energy Solutions Medical Solutions Mechanical Solutions Electronic Solutions Valve Solutions Aerospace Solutions No source force memory alloy temperature control valve

Technology Enablement

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Technology Enablement

Huaxing intelligent spring design and manufacturing system Memory alloy application development

About CATALOG

Return to Main Menu

About CATALOG

Company Introduction Innovation Process News

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Extension Springs

Extension springs, also commonly referred to as tension springs, are helical springs designed to operate under axial tensile loads. They are typically manufactured using round wire, though flat wire may be used in space-constrained applications. When unloaded, the coils of an extension spring are generally wound tightly together. This closed position generates a built-in force between the coils, known as initial tension. The magnitude of the initial tension can be adjusted during manufacturing but is ultimately limited by the material properties, mean coil diameter, and wire diameter.

Variants

English loop (full loop), German loop (half loop), swivel hook, side hook, semi-circular hook, reduced & threaded end, drawbar spring.

Application Fields

Extension springs are one of the most widely used spring types across nearly all industrial sectors. CATALOG's extension springs primarily serve six major industries: mechanical automation, packaging and filling, medical devices, electronics and appliances, power transmission, and automotive components.