welding rotato, turing roll: Type : HGZ-30 / Self-aligned Main Consistent: one power unit , one idler unit and one hand control pendant Power supply: 380V 3 Phases 50Hz Speed control : Variable Frequency Drive (VFD) Applicable diameter of working piece (mm): Φ 600-3800 Loading capacity (T): 30 Roller diameter (mm) : Φ350*120 Liner speed (mm/min) : 100-1000 Motor power (kw): 2.2 Roller Material : Rubber Control Method: Hand control panel