Korea
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    Products    Tension spring
    Specification    All line diameter of Ø0.1 ~ Ø3.0mm
    Used wire rod    SWPB (Piano line)
   SUS304WPB (Stainless line)
   SUS316WPB (Non-magnetic Stainless line)
   PBW (Phosphor bronze line)
   BeCuW (Beryum bronze line) , PEW (Enamel bronze line)
    Horizontal elasticity coefficient G   Super gravity I
    Line diameter d   Super stress
    Outer diameter Do   Weight P
    Central diameter Dm   Spring constant K
    Inner diameter Di   Index rate C
    Total tendril Nt   Stress amendment coefficient k'
    Valid tendril Ne   Sheer stress
    Long length Nt   Stress amendment coefficient
    Gunning length
    Spring coefficient calculation : K = G *  / 8 * Ne * Dm ³
    Weight calculation : P = K * (L - l) + Po
      = k' * 8 * Dm * P/ * d ³
    응력비 =   /
    Super weight calculation : Po =   * d ³ *     / 8 * Dm
    Stress amendment coefficient :

      k' = {(4 * C-1) - (4 * C-4)} + (0.615/C)