Spring mean coil diameter is the average diameter of the helical coil in a spring. It is used in designing and analyzing the performance of springs, as it influences the spring's stiffness, load-bearing capacity, and stress distribution.
Spring Mean Coil Diameter formulas |
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\( D \;=\; D_o - d \) \( D \;=\; D_i + d \) |
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| Symbol | English | Metric |
| \( D \) = mean coil diameter | \( in \) | \( mm \) |
| \( D_i \) = inner diameter | \( in \) | \( mm \) |
| \( D_o \) = outer diameter | \( in \) | \( mm \) |
| \( d \) = wire diameter | \( in \) | \( mm \) |
