Z28-500 type of thread rolling machine 林長Product features: The machine has 見習strong structure知到, excellent manufacture and strong p民裡ower. It is mainly u視長sed for rolling large trapezoidal都鐵 threads, modulus thr的醫eads and high strength st校但andard parts. Various kinds o算新f carbon steel, allo雨那y steel and non-ferrous metals with e人了longation greater than 弟現10% and tensile strength les紅體s than 100N/㎡ suitable for rolling.