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Century Spring

S-3018CS - 1.13" 302/304 Stainless Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from 302/304 stainless steel with 4 coils and closed ends. This spring features an O.D. of 1.406", and an I.D. of 1.226".

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 S-3018
Ends Closed
Finish None
Free Length 1.13 in
Inside Diameter 1.226 in
Material 302/304 Stainless Steel
Outside Diameter 1.406 in
Part Type Standard
Rate 18 lbs/in
SKU S-3018CS
Solid Length 0.45 in
Suggested Max Deflection 0.68 in
Suggested Max Load 12 lbf
Total Coils 4
Wire Diameter 0.09 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name S-3018
Ends Closed
Finish None
Free Length 28.7 mm
Inside Diameter 31.14 mm
Material 302/304 Stainless Steel
Outside Diameter 35.71 mm
Part Type Standard
Rate 3.15 N/mm
SKU S-3018CS
Solid Length 11.43 mm
Suggested Max Deflection 17.27 mm
Suggested Max Load 53.38 N
Total Coils 4
Wire Diameter 2.29 mm
The S-3018 compression spring is engineered for optimal performance in demanding applications. Constructed from high-quality 302/304 stainless 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 S-3018CS compression spring is designed with a free length of 3" total of 9.3 coils, and a rate of 1.4 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 S-3018 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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