... thrust block design. ZLYJ Gearbox for Plastic Extruder,gearbox for extruder machine,gear box SpecificationsZLYJ series speed reducer ... hard gear surface and thrust block designed for plastic screw extruder. The design of product adapts all ... screw is working. The complete machine features compact, high in bearing capacity, stable in transmission, low noise, high efficiency, etc. ZLYJ Gearbox for Plastic ...