Changzhou zhongke gearbox manufacturer Co., Ltd has more than 5 years in extruder gearbox field. we provide single screw extruder gearbox and twin screw extruder gearbox.

1)ZLYJ gearbox of 112-146 is Natural cooling, 173-250 is Coil cooling, 225-250 is Cooler Cooling with pump. the material of cooling tube is pure bronze.
2) The whole gear material is cast iron, Gear material: high alloy steel low carbon (20CrMnTi), surface is carburized case upto 0.7-1.1mm,surface hardness is HRC58-64, accuracy of gear is GB10095-88-5 standarded. gear craft is (gear grinding)
3) Our bearing is Tapered Roller Bearings
4) There are several normal ratio: 8,10,12.5,16,20, depends on customers requirements.
5) Various seal form and perfect oil leak-proof function.