TourTourCalculator for disc compression springs
 
 Spring outer diameter D = 2 r   10-3 m
 Spring inner diameter D0 = 2 r0   10-3 m
 Spring thickness δ   10-3 m
 Modulus of elasticity E   109 Pa
 Spring force F   N
 
   
 Tensile stress σ   106 Pa
 Spring deflection f   10-3 m
 Spring stiffness k = dF / df = F / f   103 N/m
 
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