... of gear is reached HRC54-62.ZLYJ Single-screw Plastic Extruder Gear Box SeriesZLYJ gear box series are ... long operation time.Plastic extruder gearbox , extruder gear box, plastic extruder machinery gear boxes,gear boxes,extruder machine gear box,plastic equipment ... machinery components, extrusion machinery components, reducers of extruder machineryModel: ZLYJ 133-8 Allowable input power(kw): 20.8 ...