1,Central rotated grab loader,grab loose rock in shaft 2,Grab ... Suitable for shaft dia above 4m Central rotated grab loader is mainly used in digging shaft work, grab loose ... digging speed and safety reliability. This kind of grab loader could also be used to seize loose material on ... is less than 500mm. Please see below technical parameter:Rotation Angel≥360°Grab productivity(m3/h)50~60Working pressure ...