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U-65CS - 0.5" Music Wire Compression Spring

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Compression spring manufactured from music wire with 6.5 coils and closed & ground ends. This spring features an O.D. of 0.281", and an I.D. of 0.219".

Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name U-65
Ends Closed & Ground
Finish None
Free Length 0.5 in
Inside Diameter 0.219 in
Material Music Wire
Outside Diameter 0.281 in
Part Type Standard
Rate 19 lbs/in
SKU U-65CS
Solid Length 0.2 in
Suggested Max Load 5.6 lbf
Total Coils 6.5
Wire Diameter 0.031 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name U-65
Ends Closed & Ground
Finish None
Free Length 12.7 mm
Inside Diameter 5.56 mm
Material Music Wire
Outside Diameter 7.14 mm
Part Type Standard
Rate 3.33 N/mm
SKU U-65CS
Solid Length 5.08 mm
Suggested Max Load 24.91 N
Total Coils 6.5
Wire Diameter 0.79 mm
The U-65 compression spring is engineered for optimal performance in demanding applications. Constructed from high-quality music wire 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 U-65CS compression spring is designed with a free length of 0.94" total of 7 coils, and a rate of 14 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 U-65 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.