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Measure four things on the original spring or a sample: wire diameter, outside diameter (of the coil body), free length (hook tip to hook tip with no load applied), and the end type (German hook, English hook, or closed loop). Note the material too. Carbon steel is standard for most applications; stainless or zinc-plated versions suit damp or outdoor assemblies. With those figures confirmed, filter the listings on PartsForMachines by dimension to find a direct cross-reference.

The 200mm figure refers to the free length, measured from hook tip to hook tip with no tension applied. That figure alone is not enough to select the correct part. You also need the outside coil diameter and wire gauge, because spring rate is determined by all three dimensions together. A spring with the same free length but a different wire diameter will have a different load characteristic and may not perform correctly in the original application.

Yes. Many listings are available in packs suited to trade use rather than single-unit retail. Where a machine uses a matched pair or bank of springs, replacing the full set in one order is the correct approach. If you need a specific quantity not shown on the listing, contact the team via WhatsApp 07754288583 or email [email protected] and they can advise on what is available.

Each product page on PartsForMachines carries the dimensional data needed to cross-reference against the original part. If the original part number is still legible, search that reference directly. If the spring has no visible marking, use your measured dimensions to filter the listings. For fitment confirmation before ordering, use Ask Simon on the relevant product page for an instant fitment check.

Returns are accepted within 30 days of purchase, in original packaging, on orders delivered within the United Kingdom. For damaged-on-arrival items, report within 24 hours with photographs to [email protected] — we will typically arrange collection and replacement at no cost to you. For parts that don't fit your machine, the Fit Guarantee covers a hassle-free return at no cost. For buyer's remorse — you've changed your mind or ordered the wrong item, email us first to obtain a Return Merchandise Number; a restocking fee may apply. Refunds are issued to the original payment method once the return is inspected.

Delivery time depends on the product, your destination, and availability — the estimated time for any item appears on the product page, and 'Check where we deliver' confirms coverage for your postcode before you order. Next-day delivery is available on most products; the option appears at checkout when applicable. We deliver across the UK, Europe, the Middle East, and Africa. Use the country selector at checkout to confirm coverage and delivery options for your destination.

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Tension Spring

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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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FAQs

Measure four things on the original spring or a sample: wire diameter, outside diameter (of the coil body), free length (hook tip to hook tip with no load applied), and the end type (German hook, English hook, or closed loop). Note the material too. Carbon steel is standard for most applications; stainless or zinc-plated versions suit damp or outdoor assemblies. With those figures confirmed, filter the listings on PartsForMachines by dimension to find a direct cross-reference.

The 200mm figure refers to the free length, measured from hook tip to hook tip with no tension applied. That figure alone is not enough to select the correct part. You also need the outside coil diameter and wire gauge, because spring rate is determined by all three dimensions together. A spring with the same free length but a different wire diameter will have a different load characteristic and may not perform correctly in the original application.

Yes. Many listings are available in packs suited to trade use rather than single-unit retail. Where a machine uses a matched pair or bank of springs, replacing the full set in one order is the correct approach. If you need a specific quantity not shown on the listing, contact the team via WhatsApp 07754288583 or email [email protected] and they can advise on what is available.

Each product page on PartsForMachines carries the dimensional data needed to cross-reference against the original part. If the original part number is still legible, search that reference directly. If the spring has no visible marking, use your measured dimensions to filter the listings. For fitment confirmation before ordering, use Ask Simon on the relevant product page for an instant fitment check.

Returns are accepted within 30 days of purchase, in original packaging, on orders delivered within the United Kingdom. For damaged-on-arrival items, report within 24 hours with photographs to [email protected] — we will typically arrange collection and replacement at no cost to you. For parts that don't fit your machine, the Fit Guarantee covers a hassle-free return at no cost. For buyer's remorse — you've changed your mind or ordered the wrong item, email us first to obtain a Return Merchandise Number; a restocking fee may apply. Refunds are issued to the original payment method once the return is inspected.

Delivery time depends on the product, your destination, and availability — the estimated time for any item appears on the product page, and 'Check where we deliver' confirms coverage for your postcode before you order. Next-day delivery is available on most products; the option appears at checkout when applicable. We deliver across the UK, Europe, the Middle East, and Africa. Use the country selector at checkout to confirm coverage and delivery options for your destination.

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