Product characteristics: 1. Mainframe: Four head steel wire wheel sanding device, use tightener device before and after polishing 2. Purpose: Polish the back of the pre-vulcanizing tyre tread 3. PLC adopt Mitsubishi series which can control the electrical machine and pneumatic drive automatically 4. Apply to the tyre tread width between 130mm-350mm; 5. Apply to the tyre tread depth between 10-50mm Main technical parameters: Max width of polishing: 450mm The speed of feeding: 150mm The Pressure when copressed air: 0.6-0.8MP Supply voltage: 380V Revolution of the sanders head: 1460r/min Voltage of Centrifugal induced draft fan: 3187-2019pa Polish electrical machine: Y160L-4(15KW) Milling wheel Rise and drop cylinder: SCD200× 100 Expression roll rise and drop cylinder: SC80× 125 Total power of Motor: 81kw Dimension of machines outline.