Shenzhen Xin Herald professional production JB7590 motor with a wave spring washers. Is a thin metal ring having a plurality of peaks and valleys on the elastic member, and variables are not usually applied to the load, demanding a smaller spring stiffness, the axial prestress is applied to the case of need, with lower noise, reducing vibration of special features . Specifications: Φ9-Φ240. Material: high quality domestic and imported carbon steel 60SizMnA. Spring steel 65Mn. Beryllium, stainless steel SUS304.301 so on. Surface treatment: black. Galvanized. Common specifications with large spot, and provide 0EM foundry and non-calibration. My company is strong in technology, process testing equipment, exquisite design capability, product quality and reliable. Company "in good faith to create a quality, quality dominate the market", with a good reputation to win the market, Xin Hennessy willing to work side by side with old and new friends, sincere cooperation, constantly climbing the peak of science and technology industry standard parts.