As the core component of the vending machine ,the vending machine spring is very important to the influnence of the appearance,size and verticality on the quality of the vending machine;the vending machine spring is different from the compression spring product , and the compression spring product mainly uses the spring rebounding force.The working principle of the vending machine spring is the torsion force,and the spring is rotated by the torsion force to sell the items placed in the spring gap. Material: Generally, high-quality SWC, SWPB, 60Si2Mn and other brand round steel materials are selected; Surface Treatment: High tech electrostatic painting and Surface environmental protection chrome plating, galvanized can be customized.