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Century Spring

72903CS - 3" Music Wire Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from music wire with 7.25 coils and closed & ground ends. This spring features an O.D. of 1.687", and an I.D. of 1.333".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 72903
Ends Closed & Ground
Finish None
Free Length 3 in
Inside Diameter 1.333 in
Material Music Wire
Outside Diameter 1.687 in
Part Type Standard
Rate 79 lbs/in
SKU 72903CS
Solid Length 1.28 in
Suggested Max Deflection 1.7 in
Suggested Max Load 136 lbf
Total Coils 7.25
Wire Diameter 0.177 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 72903
Ends Closed & Ground
Finish None
Free Length 76.2 mm
Inside Diameter 33.86 mm
Material Music Wire
Outside Diameter 42.85 mm
Part Type Standard
Rate 13.83 N/mm
SKU 72903CS
Solid Length 32.51 mm
Suggested Max Deflection 43.18 mm
Suggested Max Load 604.93 N
Total Coils 7.25
Wire Diameter 4.5 mm
The 72903 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 72903CS compression spring is designed with a free length of 2.5" total of 6.25 coils, and a rate of 83 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 72903 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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