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Century Spring

11866CS - 1.31" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 4 coils and closed ends. This spring features an O.D. of 0.984", and an I.D. of 0.862".

NOTE: The spring rate value for compression springs with 4 coils or less is a reference value.

Download CAD
Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 11866
Ends Closed
Finish None
Free Length 1.31 in
Inside Diameter 0.862 in
Material Spring Steel
Outside Diameter 0.984 in
Part Type Standard
Rate 13 lbs/in
SKU 11866CS
Solid Length 0.31 in
Suggested Max Deflection 0.67 in
Suggested Max Load 8.4 lbf
Total Coils 4
Wire Diameter 0.061 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 11866
Ends Closed
Finish None
Free Length 33.27 mm
Inside Diameter 21.89 mm
Material Spring Steel
Outside Diameter 24.99 mm
Part Type Standard
Rate 2.28 N/mm
SKU 11866CS
Solid Length 7.87 mm
Suggested Max Deflection 17.02 mm
Suggested Max Load 37.36 N
Total Coils 4
Wire Diameter 1.55 mm
The 11866 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 11866CS compression spring is designed with a free length of 1.75" total of 9.25 coils, and a rate of 8 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 11866 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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