ZLYJ Series speed reducer is high accuracy hard teeth surface transmission part with push stand designed for plastic screw extruder.the design of product adapts all technical regulations stipulated in JB/T8853-1999.it features that the gear and parts of haft are made from high strength alloy steel.the gear is made through various processing technologies such as carburizing.quenching,teeth grinding.etc.the hardness of teeth surface reaches HRC57-61.at the front end of hollow output shaft,it is equipped with super thrust bearing to withstand the working recoil.the main standard parts,such as bearing,oil seal etc.,adapt domestic qualified products. as request,it can also be equipped with imported products.it features compact,high understood capacity,stable transmission,low noise,high effciency,etc.the property of product has reached international advanced level.