Application guide for Extension Springs to ISO / DIN. The core duty of the type is storing and returning mechanical energy. The typical industries, the how-to-specify checklist, assembly practice and the exclusion cases are set out below. Stocked across roughly 0.8 mm to 4 mm, they cover light-duty and instrument-scale work.
Typical Applications for Extension Spring — ISO / DIN (Series 143)
The most common settings where these are specified:
- Vibration & cushioning: absorbing shock and maintaining contact pressure.
- General machine building: fastening covers, brackets, motors and sub-assemblies on production equipment.
- Maintenance & repair (MRO): a stocked size for servicing existing plant where the original fastener spec must be matched.
- Fabrication & metalwork: bench and on-site assembly of steel frames, enclosures and weldments.
- Mechanisms & latches: return and detent forces in moving assemblies.
How to Specify Extension Spring — ISO / DIN (Series 143) for Your Application
- Size: Select on wire diameter, and confirm it against the mating feature in the assembly. This product spans 0.8 mm–4 mm; check the full table below for the exact dimensions of each size.
- Material: Choose the material and finish for the service environment — plated steel for general use, stainless for corrosion resistance.
- Environment: For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
- Standard: This product is supplied to ISO / DIN. Quoting the standard on your order guarantees interchangeable dimensions between suppliers.
Where Extension Spring — ISO / DIN (Series 143) Are Not the Right Choice
Not where a precise, repeatable force is needed without rating the spring, and avoid over-stressing beyond the rated deflection.
