| Spring Characteristic | Open | Open & Ground | Closed | Closed & Ground |
| Pitch (p) | L – d ____ na |
L ____ na |
L – 3d ____ na |
L – 2d ____ na |
| Solid Height (H) | d(N1Â + 1) | d x N1 | d(N1Â + 1) | d x N1 |
| Total Coils (N1) | na | na + 1 | na + 2 | na + 2 |
| Free Length (L) | (p x na) + d | p x na | (p x na) + 3d | (p x na) + 2d |
| d = Diameter of Round Wire (in. or mm.) L = Free Length N1 = Number of Coils |
Na = Number of Active Coils p = Pitch |
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Ph. 281-391-1888
Compression Spring Formulas | Compression spring design specs by Katy Spring
Small Compression Springs Suppliers | Small Springs