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Century Spring

B9-20CS - 1.97" Music Wire Compression Spring

Inventory Status
Estimated Lead Time

Compression spring manufactured from music wire with 12 coils and closed ends. This spring features an O.D. of 0.42", and an I.D. of 0.38".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name B9-20
Ends Closed
Finish None
Free Length 1.97 in
Inside Diameter 0.38 in
Material Music Wire
Outside Diameter 0.42 in
Part Type Standard
Rate 0.36 lbs/in
SKU B9-20CS
Solid Length 0.26 in
Suggested Max Deflection 1.7 in
Suggested Max Load 0.61 lbf
Total Coils 12
Wire Diameter 0.02 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name B9-20
Ends Closed
Finish None
Free Length 50.04 mm
Inside Diameter 9.65 mm
Material Music Wire
Outside Diameter 10.67 mm
Part Type Standard
Rate 0.06 N/mm
SKU B9-20CS
Solid Length 6.6 mm
Suggested Max Deflection 43.18 mm
Suggested Max Load 2.71 N
Total Coils 12
Wire Diameter 0.51 mm
The B9-20CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.02" diameter music wire, the B9-20 spring design exhibits reliable strength across its 12 active coils, withstanding repeated compression cycles with a maximum load of 0.61 lbf without succumbing to fatigue.

We manufacture the B9-20 design to provide a compression spring that is 1.97" long at rest and provides a consistent rate of 0.36 lbs/in along its recommended maximum of 1.7" deflection. For best results, your application should fully accommodate the inner (0.38") and outer (0.42") diameters of this spring and be designed for its closed end configuration.

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