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Century Spring

B18-128CS - 0.5" 302/304 Stainless Steel Compression Spring

Inventory Status
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Compression spring manufactured from 302/304 stainless steel with 5.25 coils and closed ends. This spring features an O.D. of 0.156", and an I.D. of 0.136".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name B18-128
Ends Closed
Finish None
Free Length 0.5 in
Inside Diameter 0.136 in
Material 302/304 Stainless Steel
Outside Diameter 0.156 in
Part Type Standard
Rate 1.3 lbs/in
SKU B18-128CS
Solid Length 0.06 in
Suggested Max Deflection 0.22 in
Suggested Max Load 0.27 lbf
Total Coils 5.25
Wire Diameter 0.01 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name B18-128
Ends Closed
Finish None
Free Length 12.7 mm
Inside Diameter 3.45 mm
Material 302/304 Stainless Steel
Outside Diameter 3.96 mm
Part Type Standard
Rate 0.23 N/mm
SKU B18-128CS
Solid Length 1.52 mm
Suggested Max Deflection 5.59 mm
Suggested Max Load 1.2 N
Total Coils 5.25
Wire Diameter 0.25 mm
The B18-128 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 B18-128CS compression spring is designed with a free length of 0.34" total of 6 coils, and a rate of 6.9 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 B18-128 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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