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Century Spring

73640CS - 8" Oil Tempered Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from oil tempered with 7.25 coils and closed & ground ends. This spring features an O.D. of 4.906", and an I.D. of 3.906".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 73640
Ends Closed & Ground
Finish None
Free Length 8 in
Inside Diameter 3.906 in
Material Oil Tempered
Outside Diameter 4.906 in
Part Type Standard
Rate 200 lbs/in
SKU 73640CS
Solid Length 3.63 in
Suggested Max Deflection 3.3 in
Suggested Max Load 667 lbf
Total Coils 7.25
Wire Diameter 0.5 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 73640
Ends Closed & Ground
Finish None
Free Length 203.2 mm
Inside Diameter 99.21 mm
Material Oil Tempered
Outside Diameter 124.61 mm
Part Type Standard
Rate 35.02 N/mm
SKU 73640CS
Solid Length 92.2 mm
Suggested Max Deflection 83.82 mm
Suggested Max Load 2966.82 N
Total Coils 7.25
Wire Diameter 12.7 mm
The 73640CS 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 oil tempered, the 73640 spring design exhibits reliable strength across its 7.25 active coils, withstanding repeated compression cycles with a maximum load of 667 lbf without succumbing to fatigue.

We manufacture the 73640 design to provide a compression spring that is 8" long at rest and provides a consistent rate of 200 lbs/in along its recommended maximum of 3.3" deflection. For best results, your application should fully accommodate the inner (3.906") and outer (4.906") diameters of this spring and be designed for its closed & ground end configuration.

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