Shot peening is when hundreds of thousands of round little steel balls bombard a spring’s surface during the heat treating process.
Stresses naturally build up in the metal. The purpose of shot peening is to remove these inherited stresses. A spring that has been shot peened will last three to five times longer than a spring that has not been shot.
We like to say shot peening turns unhappy molecules into happy molecules.
100% of both leaf and coil springs from Eaton Detroit Spring are shot peened.
