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II-66CS - 1.38" Spring Steel Compression Spring

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Compression spring manufactured from spring steel with 16.5 coils and closed ends. This spring features an O.D. of 0.25", and an I.D. of 0.17".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name II-66
Ends Closed
Finish Zinc
Free Length 1.38 in
Inside Diameter 0.17 in
Material Spring Steel
Outside Diameter 0.25 in
Part Type Standard
Rate 27 lbs/in
SKU II-66CS
Solid Length 0.7 in
Suggested Max Deflection 0.35 in
Suggested Max Load 9.5 lbf
Total Coils 16.5
Wire Diameter 0.04 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name II-66
Ends Closed
Finish Zinc
Free Length 35.05 mm
Inside Diameter 4.32 mm
Material Spring Steel
Outside Diameter 6.35 mm
Part Type Standard
Rate 4.73 N/mm
SKU II-66CS
Solid Length 17.78 mm
Suggested Max Deflection 8.89 mm
Suggested Max Load 42.26 N
Total Coils 16.5
Wire Diameter 1.02 mm
The II-66 compression spring is engineered for optimal performance in demanding applications. Constructed from high-quality spring steel and designed with precision and durability in mind, this spring is an essential component for a variety of mechanical systems where reliable force and resilience are paramount.

The II-66CS compression spring is designed with a free length of 2" total of 8 coils, and a rate of 32 lbs/in providing a balanced combination of flexibility and strength. This spring coil, and its closed & ground end configuration allows for efficient energy storage and release, making it suitable for applications requiring precise motion control.

The II-66 spring design is ideal for use in industrial machinery, automotive systems, and various mechanical assemblies where reliable force application is crucial. Its robust construction and thoughtful design make it a dependable choice for engineers seeking a high-performance spring solution.

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