Compression spring pogopin formula

　　The meaning represented by each term in the above formula is: G=shear modulus of elasticity [MPa] (G value size: carbon steel 80000, stainless steel 72000) d=wire diameter [mm, in] n=effective number of coils [-] D=center diameter [mm, in] k=spring pogopin coefficient [N/mm, lb/in]

　　This formula is the calculation formula for the stiffness of the spring pogopin. The stiffness multiplied by the working stroke is equal to the working force of the spring pogopin.

　　From the above equation, we can conclude that the parameters of the compression spring pogopin must be composed of: material, wire diameter, center diameter, effective number of coils, total length of the spring pogopin, working height, and required force. If there are no special requirements for the strength of the spring pogopin, the working height and required strength parameters of the spring pogopin can be omitted.

　　1. Choose spring pogopin materials based on actual product requirements.

　　2. According to product requirements, determine the inner and outer diameters, effective number of coils, and the range of wire diameter values of the spring pogopin.

　　3. Substitute relevant parameters into the design parameter formula.

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