model SGB-620/40T SGB-420/30 SGD-280/11 SGD-320/17B Transportation volume(t/h) 150 80 30 40 Design length(m) 100 100 80 80 Electromotor type JDSB-40 JDSB-30 JDSB-11 JDSB-17 power(KW) 40 30 11 17 rotate speed(r/min) 1470 1470 1450 1470 voltage(V) 380/660 380/660 380/660 380/660 Retarder ratio 1:24.564 1:24.923 1:18.9 1:24.95 Scraper chain chain speed(m/s) 0.868 0.738 0.618 0.59 breaking force â?¥320 â?¥190 â?¥127.4 â?¥190 chain link spec.(mm) 18*64 14*50 14*40 14*50 scraper distance (mm) 1024 1000 800 700 middle groove dimension(mm) 1500*620*180 1200*420*180 1200*280*125 1200*3200*150 machine weight (KG) 17800 8581 3100 6400/6800 -