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RS PRO Stainless Steel Extension Spring, 25 mm Free Length, 5 mm Outside Diameter, Initial Tension 5.4 N, Spring 821-425
Specifications
| Country of Origin | United Kingdom |
|---|---|
| Brand | RS PRO |
| Material | Stainless Steel |
| Model | 821-425 |
| Outside diameter | 5mm |
| Wire Diameter | 0.45mm |
| Standards/Approvals | DIN 17223, BS 1408 CR3, RoHS |
| Free Length | 25mm |
| Spring Rate | 0.09N/mm |
| Maximum Extended Length | 80.8mm |
| Initial Tension | 5.4N |
| RS PRO Stainless Steel Extension Spring, 27.7 mm x 5.5 mm ODBrand | RS PRO |
Key Features
- The spring has an initial tension of 5.4 N allowing it to absorb and store energy effectively.
- Constructed from stainless steel for excellent corrosion resistance and durability.
- The spring rate is 0.09 N/mm providing precise force response with maximum extension up to 80.8 mm.
- Features side hook ends for secure attachment in mechanical assemblies.
- Complies with DIN 17223, BS 1408 CR3, and RoHS standards ensuring industrial quality and safety.
- Ideal for use in robotics, automotive interiors, garage door assemblies, trampoline springs, and various machinery applications.
- Manufactured in the United Kingdom under stringent quality controls.
Product Description
RS PRO 821-425 Stainless Steel Extension Spring is engineered with a free length of 25 mm and an outside diameter of 5 mm to provide effective energy absorption and resistance to pulling forces for industrial and mechanical uses.
Made from premium stainless steel, this extension spring ensures durability and excellent corrosion resistance, suitable for demanding environments. This spring exhibits an initial tension of 5.4 N and a precise spring rate of 0.09 N/mm, allowing it to extend up to 80.8 mm while delivering consistent force.
Both ends of the spring wire are formed with side hooks to facilitate secure installation in various mechanical, fluid power, and tool applications. Standards compliance includes DIN 17223, BS 1408 CR3, and RoHS certification, guaranteeing high-quality manufacturing processes and safety.
Applications range widely across robotics, automotive interior and exterior mechanisms, garage door assemblies, lever mechanisms, carburettors, trampoline springs, washing devices, farm machinery, toys, window screens, pool covers, sofa beds, and upholstery tension needs.
The spring stores and releases mechanical energy efficiently. Constructed with high tensile strength stainless steel wire. Side hooks enable reliable attachment points. Maximum extended length allows flexibility in dynamic systems.
RoHS compliant material meets environmental and safety standards. Manufactured in the United Kingdom, this RS PRO spring assures industrial-grade performance for professional engineering applications. For comprehensive selection and assurance of quality, explore the full RS PRO range of mechanical components on EnvMart.
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Frequently Asked Questions
The initial tension of this extension spring is 5.4 N, allowing it to effectively absorb and store energy.
This extension spring can extend up to a maximum length of 80.8 mm.
It is constructed from stainless steel, which provides excellent corrosion resistance and durability.
The spring has a free length of 25 mm and an outside diameter of 5 mm.
The spring rate of this model is 0.09 N/mm, which allows for precise force response.
This extension spring complies with DIN 17223, BS 1408 CR3, and RoHS standards, ensuring industrial quality and safety.
It is suitable for various applications including robotics, automotive interiors, garage door assemblies, and trampoline springs.
Both ends of the spring wire are formed with side hooks to facilitate secure installation in mechanical assemblies.
This model is manufactured in the United Kingdom under stringent quality controls.
The wire diameter of this extension spring is 0.45 mm.
Key features include its initial tension of 5.4 N, maximum extension of 80.8 mm, and compliance with safety standards.
The design allows it to store and release mechanical energy efficiently, making it suitable for dynamic systems.
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