Extension Springs

An extension spring or tension spring is a length of tightly coiled metal, usually steel with hooks or loops at either end. Extension springs absorb and store energy.

What does it do?
An extension spring is a component that creates a resistance to a pulling force. Extension springs work by trying to pull two objects back together. The attached spring is pulled in opposite directions and the force and the stored energy to pull the two objects back together.

Types
Extension or tension springs selected by a few key attributes, they are:
  • Material – Steel or stainless steel

  • Free length - The overall length of the spring in its unloaded position
  • Max extended length – The length of the spring when it is fully extended
  • Outside diameter – The outside diameter of the springs coils
  • Wire diameter – The diameter of the metal used to make the spring
  • Spring rate – The force, quoted in N/mm
  • Max load – The load when the spring is at full extension

Uses

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Viewing 41 - 57 of 57 products
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Description Price Material Free Length Maximum Extended Length Outside Diameter Wire Diameter Initial Tension Spring Rate Ends
RS Stock No. 821-475
BrandRS PRO
£0.843
Each (In a Pack of 10)
Units
Stainless Steel 30.4mm 86.60mm 6mm 0.55mm 7.9N 0.12N/mm -
RS Stock No. 751-837
BrandRS PRO
£0.947
Each (In a Pack of 10)
Units
Steel 44.6mm 130.20mm 9mm 0.8mm 19N 0.19N/mm -
RS Stock No. 821-532
BrandRS PRO
£0.988
Each (In a Pack of 10)
Units
Stainless Steel 38.5mm 106.00mm 7.5mm 0.7mm 12.8N 0.17N/mm -
RS Stock No. 751-758
BrandRS PRO
£0.922
Each (In a Pack of 10)
Units
Steel 41.4mm 125.70mm 6mm 0.55mm 9.5N 0.1N/mm -
RS Stock No. 751-663
BrandRS PRO
£0.844
Each (In a Pack of 10)
Units
Steel 27.2mm 95.7mm 4mm 0.36mm 4.26N 0.06N/mm -
RS Stock No. 751-742
BrandRS PRO
£0.774
Each (In a Pack of 10)
Units
Steel 30.4mm 86.6mm 6mm 0.55mm 9.5N 0.15N/mm -
RS Stock No. 751-736
BrandRS PRO
£0.743
Each (In a Pack of 10)
Units
Steel 26.4mm 41.1mm 3.5mm 0.55mm 15.7N 0.9N/mm -
RS Stock No. 751-714
BrandRS PRO
£0.753
Each (In a Pack of 10)
Units
Steel 27.7mm 80mm 5.5mm 0.5mm 7.80N 0.13N/mm -
RS Stock No. 751-815
BrandRS PRO
£0.763
Each (In a Pack of 10)
Units
Steel 39.00mm 64.60mm 5.5mm 0.8mm - 1N/mm -
RS Stock No. 751-764
BrandRS PRO
£0.814
Each (In a Pack of 10)
Units
Steel 31mm 53.6mm 4.5mm 0.63mm 18.3N 0.7N/mm -
RS Stock No. 894-6806
BrandRS PRO
£4.65
Each
Units
Steel Black 200mm - - - - - -
RS Stock No. 751-770
BrandRS PRO
£0.763
Each (In a Pack of 10)
Units
Steel 35mm 101.5mm 7mm 0.63mm 12.2N 0.16N/mm -
RS Stock No. 751-691
BrandRS PRO
£0.753
Each (In a Pack of 10)
Units
Steel 25mm 80.80mm 5mm 0.45mm 6.48N 0.11N/mm -
RS Stock No. 751-809
BrandRS PRO
£0.805
Each (In a Pack of 10)
Units
Steel 38.5mm 106.00mm 7.5mm 0.7mm 15.4N 0.2N/mm -
RS Stock No. 821-403
BrandRS PRO
£0.858
Each (In a Pack of 10)
Units
Stainless Steel 32.9mm 87.6mm 3.6mm 0.4mm 5.44N 0.093N/mm Looped
RS Stock No. 821-469
BrandRS PRO
£0.812
Each (In a Pack of 10)
Units
Stainless Steel 26.40mm 41.10mm 3.5mm 0.55mm 13.1N 0.75N/mm -
RS Stock No. 751-786
BrandRS PRO
£0.774
Each (In a Pack of 10)
Units
Steel 47.6mm 147.3mm 7mm 0.63mm 12.2N 0.11N/mm -
Related Products
Manufactured from high tensile strength piano/music wire, with ...
Description:
Manufactured from high tensile strength piano/music wire, with a right-hand (clockwise) helix and looped ends. Attached at both endsSprings absorb and store energyCreate resistance to pulling forceInitial tension manipulation can achieve individual requirementsWound to oppose extension.
Extension springs are coiled attached by two components ...
Description:
Extension springs are coiled attached by two components from both ends of the spring. When pulled apart the extension springs pull them back together again. The springs tension can be adapted depending on the applications load requirements. Absorb and store energyPulling force resistanceWound springs to oppose extensionAvailable in various sizes. ...