
Torsion spring design explained: torque, legs, materials and configurations. BQUQ, a Dongguan spring factory, quotes custom torsion springs in 12 hours.

Music wire, stainless 302/304, and beryllium copper C17200 for springs: strength, corrosion, conductivity, temperature, cost, and how to choose.

The compression spring rate formula k = Gd⁴/(8D³n), explained variable by variable with a worked example, measuring tips, and how to spec rate to a factory.

What defines a compression spring: the parameters a factory needs to quote, typical materials and tolerances, and ordering custom springs from China.
