The metal shredder reducer needs oil after the completion of the operation. It opens the cleaning bearings, replaces the lubricating oil and the lubricity of the bearings from the beginning. The whole frame plate is thicker and durable. Using microcomputer (PLC) automatic control, set up start, stop, reverse and automatic reverse control function. The rubber shredder has low speed, high torque, low noise, and shredder dust can reach the flash point of environmental protection standard. The equipment is easy to adjust, the maintenance cost is low, and the economy is durable. The thickness of the tool and the number of the claw can be changed according to the material that is torn apart.