Tension springs hold load by stretching: the coiled wire resists extension and pulls components back to their resting position when the load is released. They appear throughout industrial machinery, agricultural equipment, garage door mechanisms, and general fabrication wherever a controlled return force is needed, and replacing a fatigued or broken spring with one of the correct specification is a straightforward job when you have the right part to hand.
Selecting the correct tension spring means matching four attributes: wire diameter, outside diameter, free length, and the hook or loop end configuration. A 200mm extension spring, for example, will be specified by its coil diameter and wire gauge as much as its overall length, because the spring rate depends on all three. Material grade also matters: standard carbon steel suits most indoor applications, while stainless or zinc-plated versions are the preferred choice for damp environments or exterior assemblies. Each listing on PartsForMachines carries the dimensional data needed to cross-reference against the original part or a measured sample. Across this section, Metrol supplies the tension spring.
When a spring fails in a paired or multi-spring assembly, trade practice is to replace all springs in that set together. Mixing a new spring with a fatigued one creates an uneven load that shortens the life of the replacement. If the original specification is worn or illegible, callipers on the wire and coil body will give you the key figures; the free length is measured hook-tip to hook-tip with no load applied.
For sizing confirmation or trade quantities, contact the team via WhatsApp 07754288583 or email [email protected].
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