... economic hydraulic elbow making machine,gorelocker,spiral duct machinery,is for making duct elbows, max. thickness 1.2mm, max dia 1000mm.Hydraulic elbow making machine,gore locker ... steel(Max.thickness 1.0mm)3.3 Diameter range of elbow: 100-1000mm3.4 Max forming speed: 120m/min3.5 ... 900mm3.7 Weight: 750kg spiral duct machinery, gorelocker, hdyraulic elbow making machine. hydraulic elbow making machine