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 - 60 of 60 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
£0.86
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
£0.966
Each (In a Pack of 10)
Units
Steel 44.6mm 130.20mm 9mm 0.8mm 19N 0.19N/mm -
RS Stock No. 751-758
BrandRS PRO
£0.94
Each (In a Pack of 10)
Units
Steel 41.4mm 125.70mm 6mm 0.55mm 9.5N 0.1N/mm -
RS Stock No. 821-532
BrandRS PRO
£0.998
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. 751-663
BrandRS PRO
£0.861
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
£0.798
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
£0.765
Each (In a Pack of 10)
Units
Steel 26.4mm 41.1mm 3.5mm 0.55mm 15.7N 0.9N/mm -
RS Stock No. 751-815
BrandRS PRO
£0.786
Each (In a Pack of 10)
Units
Steel 39.00mm 64.60mm 5.5mm 0.8mm - 1N/mm -
RS Stock No. 751-714
BrandRS PRO
£0.776
Each (In a Pack of 10)
Units
Steel 27.7mm 80mm 5.5mm 0.5mm 7.80N 0.13N/mm -
RS Stock No. 751-764
BrandRS PRO
£8.30
1 Pack of 10
Pack(s)
Steel 31mm 53.6mm 4.5mm 0.63mm 18.3N 0.7N/mm -
RS Stock No. 751-770
BrandRS PRO
£0.786
Each (In a Pack of 10)
Units
Steel 35mm 101.5mm 7mm 0.63mm 12.2N 0.16N/mm -
RS Stock No. 894-6806
BrandRS PRO
£4.70
Each
Units
- 200mm - - - - - -
RS Stock No. 751-691
BrandRS PRO
£0.768
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
£0.829
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
£0.875
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. 751-786
BrandRS PRO
£0.798
Each (In a Pack of 10)
Units
Steel 47.6mm 147.3mm 7mm 0.63mm 12.2N 0.11N/mm -
RS Stock No. 821-469
BrandRS PRO
£0.836
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. 683-1645
Mfr. Part No.4300-3735
£6.395
Each (In a Bag of 2)
Units
- - - - - - - -
RS Stock No. 803-4433
Mfr. Part No.1212047
£3.44
Each
Units
- - - - - - - -
RS Stock No. 683-1649
Mfr. Part No.4300-3736
£6.395
Each (In a Bag of 2)
Units
- - - - - - - -