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Century Spring

840 - 3.25 Inch Spring Steel Compression Spring

Inventory Status
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Compression spring manufactured from Spring Steel with 11.8 coils and Closed & Ground ends. This spring features an O.D. of 1.188 Inch, and an I.D. of 0.804 Inch.

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 840
Ends Closed & Ground
Finish Zinc
Free Length 3.25 in
Inside Diameter 0.804 in
Material Spring Steel
Outside Diameter 1.188 in
Part Type Standard
Rate 203 lbs/in
SKU 840CS
Solid Length 2.26 in
Suggested Max Deflection 0.81 in
Suggested Max Load 164 lbf
Total Coils 11.8
Wire Diameter 0.192 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 840
Ends Closed & Ground
Finish Zinc
Free Length 82.55 mm
Inside Diameter 20.42 mm
Material Spring Steel
Outside Diameter 30.18 mm
Part Type Standard
Rate 35.55 N/mm
SKU 840CS
Solid Length 57.4 mm
Suggested Max Deflection 20.57 mm
Suggested Max Load 729.47 N
Total Coils 11.8
Wire Diameter 4.88 mm
The 840CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.192" diameter hard drawn, the 840 spring design exhibits reliable strength across its 11.8 active coils, withstanding repeated compression cycles with a maximum load of 164 lbf without succumbing to fatigue.

We manufacture the 840 design to provide a compression spring that is 3.25" long at rest and provides a consistent rate of 203 lbs/in along its recommended maximum of 0.81" deflection. For best results, your application should fully accommodate the inner (0.804") and outer (1.188") diameters of this spring and be designed for its closed & ground end configuration.

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