WC-6,WC-8 the two types energy supplied by tractor PTO. WC-12,WC-18 the two types self-energy. Technical Parameters: Model WF-RXW-6 WF-RXW-8 WF-RXW-12 WF-RXW-18 Packing Dimensions (LXWXH mm) 1200*1120*1120 1200*1150*1150 1450*1050*1330 1450*1050*1350 Structural Weight 240kg 260kg 310kg 350kg Blade Turning Radius (mm) 300 320 300 320 Max. Chipper Diameter 150mm 200mm 150mm 200mm Chipper Efficiency 7-8m3/h 8-9m3/h 7-8m3/h 8-9m3/h Input Turning Speed (r/m) 540 540 Packing Method Iron Crate Iron Crate Iron Crate Iron Crate PTO Spline (mm) 6*6*520 6*6*520 Power Matched 20-50hp 50-80hp 12hp Diesel Engine 18hp Diesel Engine