... rubber screw extruder with pushing package. All technical specifications of product design refer to JB/T8853-2001 "Cylindrical gear ... GB10095-88, 6 grades. The hardness of tooth surface are HRC54 ~ 62. In fore-end of hollow shaft the reducer is ... ; - ZSYJ450, ZSYJ560, ZSYJ630We also have many other different types of products, including reducers, motors, chains, electric rollers, Concrete Mixing ...