... 2.5t to 16t, which include QTG25, QTZ25, QTZ31.5, QTZ40, QTZ63, QTZ80, QTZ100, QTZ125, QTZ160 and ... customers in different construction fields. parameters QTZ 31.5 series 3808 Maximum rated Torque(KN.m)315Maximum ... .8Hoisting Speed(m/min)A=2A=455/27.5/4.75Radius changing Speed(m/min)22/33Swiveling speed(r/min ... )0.5Climbing speed(m/min) ...