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Century Spring

3545CS - 0.75" Music Wire Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from music wire with 4 coils and closed & ground ends. This spring features an O.D. of 0.5", and an I.D. of 0.41".

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 3545
Ends Closed & Ground
Finish Zinc
Free Length 0.75 in
Inside Diameter 0.41 in
Material Music Wire
Outside Diameter 0.5 in
Part Type Standard
Rate 31 lbs/in
SKU 3545CS
Solid Length 0.18 in
Suggested Max Deflection 0.31 in
Suggested Max Load 9.8 lbf
Total Coils 4
Wire Diameter 0.045 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 3545
Ends Closed & Ground
Finish Zinc
Free Length 19.05 mm
Inside Diameter 10.41 mm
Material Music Wire
Outside Diameter 12.7 mm
Part Type Standard
Rate 5.43 N/mm
SKU 3545CS
Solid Length 4.57 mm
Suggested Max Deflection 7.87 mm
Suggested Max Load 43.59 N
Total Coils 4
Wire Diameter 1.14 mm
The 3545CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.045" diameter music wire, the 3545 spring design exhibits reliable strength across its 4 active coils, withstanding repeated compression cycles with a maximum load of 9.8 lbf without succumbing to fatigue.

We manufacture the 3545 design to provide a compression spring that is 0.75" long at rest and provides a consistent rate of 31 lbs/in along its recommended maximum of 0.31" deflection. For best results, your application should fully accommodate the inner (0.41") and outer (0.5") diameters of this spring and be designed for its closed & ground end configuration.

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