... hard gear surface and thrust block design. ZLYJ Gearbox for Plastic Extruder,gearbox for extruder machine,gear box SpecificationsZLYJ series speed reducer is a ... high precision hard gear surface and thrust block designed for plastic screw extruder. The design of product adapts all kinds of norm ... , stable in transmission, low noise, high efficiency, etc. ZLYJ Gearbox for Plastic Extruder