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Century Spring

77121CS - 5.906" Music Wire Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from music wire with 12.68 coils and closed & ground ends. This spring features an O.D. of 2.157", and an I.D. of 1.591".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 77121
Ends Closed & Ground
Finish None
Free Length 5.906 in
Inside Diameter 1.591 in
Material Music Wire
Outside Diameter 2.157 in
Part Type Metric
Rate 131.31 lbs/in
SKU 77121CS
Solid Length 3.589 in
Suggested Max Deflection 3.055 in
Suggested Max Load 401.197 lbf
Total Coils 12.68
Wire Diameter 0.283 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 77121
Ends Closed & Ground
Finish None
Free Length 150.01 mm
Inside Diameter 40.41 mm
Material Music Wire
Outside Diameter 54.79 mm
Part Type Metric
Rate 22.99 N/mm
SKU 77121CS
Solid Length 91.16 mm
Suggested Max Deflection 77.6 mm
Suggested Max Load 1784.52 N
Total Coils 12.68
Wire Diameter 7.19 mm
The 77121 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 77121CS compression spring is designed with a free length of 5.118" total of 11.1 coils, and a rate of 154.109 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 77121 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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