Impact idler specifications: Free maintenance rollerFree maintenance Impact Idlers are built to withstand the shock at the loading zone. The rubber rolls used on impact idlers are made of natural molded rubber which is ideal for shock absorbing characteristics.1.Dia 60-219,length 190-34002.Used in mining,cement,steel,harbor,etc3.Standard: GB,DIN,CEMA.Standard: GB, ISO, CEMA, DIN, JIS, etc.. ...