Tension Spring

Heavy-Duty & Long-lasting Extension Springs

Extension springs, also known as closed coil helical springs, have both ends attached to different components. When an external force is applied, causing the components to move apart, these springs exert force to return the components to their original position. This characteristic makes them ideal for applications requiring tension or expansion. HSI offers high-quality extension springs designed for durability and longevity.

HSI provides extension springs with various capabilities, including:

Ends: Our extension springs are available with different end types, such as full-loop and machine-made loop configurations. The loops or hooks may feature a crossway center transition of the previous coil before forming the loop or hook.

Tolerances: The tolerance of an extension spring depends on its wire diameter and body diameter. Actual tolerance values are determined by the specifications of the tension helical springs, typically ranging between +/-10% and +/-5%.

Specifications of Extension Springs

The extension springs available with us have the following specifications:

Capabilities of Extension Springs

We provide extension springs of the following capabilities:

• Ends: The different end types of extension springs provided by HSI are full-loop and machine-made loop configurations. The loops or hooks may have crossways center transition of the previous coil, before creating a loop or hook.
• Tolerances: The tolerance of an extension spring depends on its wire diameter and the body diameter. Actual values of tolerances depend on the specifications of these tension helical springs. Generally, the tolerance range of these springs varies between +/-10% and +/-5%.

Types of Extension Springs

We offer a range of mechanical extension springs, including:

• Continuous Length Extension Springs
  
• Heavy Duty Extension Springs
• Round Wire Extension Springs
• High-Performance Extension Springs
• Extension Spring End Types
  

Extension Spring End Types

There are several end types of an extension spring. Here are some end types:

Machine Cut Plain Ends
Single Full Loop Over Center
Small Offset Hook at the Side
Machine Half Hook Over Center
Double Full Loop Over Center
Coned End With Swivel Bolts
Half Loop Over Center
Full Loop at Side
Coned End With Swivel Hook
Long Round End Hook Over Center
Small Eye at the Side
Threaded Plug to Fit Plain End Spring
Y - Hook Over Center
Extended Eye Over Center
Drawbar Spring

APPLICATIONS

Extension Spring Shape Types

Extension springs can be designed in various shapes, such as:

• Conical
• Barrel
• Helical
• Oval
• Cylindrical

Extension springs can feature various end types to suit different applications.

Extension springs find applications in diverse industries, including:

• Garage Doors
• Electronic Components and Switches
• Automobile Component Manufacturing
• Hydraulic and Pneumatic Systems
• Oil and Mechanical Seals
• Extension Spring Shape Types

Extension springs can be designed in various shapes to accommodate specific requirements, including conical, barrel, helical, oval, and cylindrical shapes.

The extensive stock of extension springs in our catalog enables you to choose the right type for your application. For more information about our extension springs and other products, please contact us at sales@hariomespring.com.