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Century Spring

4000-ACS - 18.8" Spring Steel Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from spring steel with 11.3 coils and closed & ground ends. This spring features an O.D. of 5.5", and an I.D. of 4.5".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 4000-A
Ends Closed & Ground
Finish None
Free Length 18.8 in
Inside Diameter 4.5 in
Material Spring Steel
Outside Diameter 5.5 in
Part Type Standard
Rate 78 lbs/in
SKU 4000-ACS
Solid Length 5.63 in
Suggested Max Deflection 6.8 in
Suggested Max Load 532 lbf
Total Coils 11.3
Wire Diameter 0.5 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 4000-A
Ends Closed & Ground
Finish None
Free Length 477.52 mm
Inside Diameter 114.3 mm
Material Spring Steel
Outside Diameter 139.7 mm
Part Type Standard
Rate 13.66 N/mm
SKU 4000-ACS
Solid Length 143 mm
Suggested Max Deflection 172.72 mm
Suggested Max Load 2366.34 N
Total Coils 11.3
Wire Diameter 12.7 mm
The 4000-ACS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.5" diameter spring steel, the 4000-A spring design exhibits reliable strength across its 11.3 active coils, withstanding repeated compression cycles with a maximum load of 532 lbf without succumbing to fatigue.

We manufacture the 4000-A design to provide a compression spring that is 18.8" long at rest and provides a consistent rate of 78 lbs/in along its recommended maximum of 6.8" deflection. For best results, your application should fully accommodate the inner (4.5") and outer (5.5") diameters of this spring and be designed for its closed & ground end configuration.

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