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 21 - 40 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. 751-922
BrandRS PRO
£1.078
Each (In a Pack of 10)
Units
Steel 66.2mm 178.20mm 13mm 1.2mm 42.2N 0.32N/mm -
RS Stock No. 751-916
BrandRS PRO
£1.326
Each (In a Pack of 10)
Units
Steel 59mm 98.6mm 8.5mm 1.2mm 62.8N 1.35N/mm -
RS Stock No. 751-843
BrandRS PRO
£1.16
Each (In a Pack of 10)
Units
Steel 60.6mm 188.6mm 9mm 0.8mm 19N 0.13N/mm -
RS Stock No. 121-337
BrandRS PRO
£1.071
Each (In a Pack of 10)
Units
Steel 48mm 58.10mm 11mm 2.2mm 259N 21.9N/mm -
RS Stock No. 894-6803
BrandRS PRO
£4.66
Each
Units
Steel Bright Zinc Plated 200mm - - - - - -
RS Stock No. 821-510
BrandRS PRO
£0.964
Each (In a Pack of 10)
Units
Stainless Steel 47.6mm 147.30mm 7mm 0.63mm 10.2N 0.09N/mm -
RS Stock No. 751-821
BrandRS PRO
£1.01
Each (In a Pack of 10)
Units
Steel 32.6mm 86.1mm 9mm 0.8mm 19N 0.3N/mm -
RS Stock No. 121-359
BrandRS PRO
£1.72
Each (In a Pack of 5)
Units
Steel 77.8mm 97.4mm 13mm 2.5mm 317N 13.7N/mm -
RS Stock No. 121-393
BrandRS PRO
£3.172
Each (In a Pack of 5)
Units
Steel 78.5mm 93.50mm 18mm 3.6mm 630N 35.8N/mm -
RS Stock No. 751-859
BrandRS PRO
£0.805
Each (In a Pack of 10)
Units
Steel 44.1mm 73.80mm 6.3mm 0.9mm 37.1N 1.06N/mm -
RS Stock No. 121-400
BrandRS PRO
£4.14
Each (In a Pack of 3)
Units
Steel 87.2mm 103.4mm 20mm 4mm 757N 39.7N/mm -
RS Stock No. 821-526
BrandRS PRO
£0.823
Each (In a Pack of 10)
Units
Stainless Steel 34.5mm 59.50mm 5mm 0.7mm 18.8N 0.64N/mm -
RS Stock No. 821-497
BrandRS PRO
£0.781
Each (In a Pack of 10)
Units
Stainless Steel 31mm 53.60mm 4.5mm 0.63mm 15.2N 0.58N/mm -
RS Stock No. 821-396
BrandRS PRO
£0.825
Each (In a Pack of 10)
Units
Stainless Steel 27.2mm 95.70mm 4mm 0.36mm 3.55N 0.048N/mm -
RS Stock No. 751-871
BrandRS PRO
£0.944
Each (In a Pack of 10)
Units
Steel 49mm 81.7mm 7mm 1mm 45.3N 1.18N/mm -
RS Stock No. 751-679
BrandRS PRO
£0.834
Each (In a Pack of 10)
Units
Steel 32.9mm 87.6mm 3.6mm 0.4mm 6.53N 0.11N/mm -
RS Stock No. 894-6800
BrandRS PRO
£5.06
Each
Units
Steel Black 250mm - - - - - -
RS Stock No. 751-685
BrandRS PRO
£0.735
Each (In a Pack of 10)
Units
Steel 22.1mm 42.3mm 3.2mm 0.45mm 10.70N 0.49N/mm -
RS Stock No. 821-453
BrandRS PRO
£0.964
Each (In a Pack of 10)
Units
Stainless Steel 37.7mm 116.10mm 5.5mm 0.5mm 6.50N 0.07N/mm -
RS Stock No. 821-431
BrandRS PRO
£0.76
Each (In a Pack of 10)
Units
Stainless Steel 24.5mm 41.80mm 3.5mm 0.5mm 10N 0.49N/mm -
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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 energy Pulling force resistance Wound springs to oppose extension Available ...
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