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Century Spring

B12-9CS - 0.44" Music Wire Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from music wire with 12.3 coils and closed & ground ends. This spring features an O.D. of 0.125", and an I.D. of 0.079".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name B12-9
Ends Closed & Ground
Finish Black Oxide
Free Length 0.44 in
Inside Diameter 0.079 in
Material Music Wire
Outside Diameter 0.125 in
Part Type Standard
Rate 37 lbs/in
SKU B12-9CS
Solid Length 0.28 in
Suggested Max Deflection 0.15 in
Suggested Max Load 5.5 lbf
Total Coils 12.3
Wire Diameter 0.023 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name B12-9
Ends Closed & Ground
Finish Black Oxide
Free Length 11.18 mm
Inside Diameter 2.01 mm
Material Music Wire
Outside Diameter 3.18 mm
Part Type Standard
Rate 6.48 N/mm
SKU B12-9CS
Solid Length 7.11 mm
Suggested Max Deflection 3.81 mm
Suggested Max Load 24.46 N
Total Coils 12.3
Wire Diameter 0.58 mm
The B12-9 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 B12-9CS compression spring is designed with a free length of 0.72" total of 6.25 coils, and a rate of 45 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 B12-9 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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