We are a leading machinery company in China.We mainly produces construction machinery,for example; tower crane,building hoist,concrete pump,concrete batching plant,concrete mixer and so on.The tower cranes are welcomed by all our customers. QTZ80 tower crane parameters: rated lifting torque (KN.m): 800 maximum working amplitude(m): 53 rated payload capacity at maximum amplitude(t): 1.245 radius changing speed(m/min): 44/22 swiveling speed (r/min): 0.62 raising speed (m/min): 0.4 Total motor power (kw): 41.52 what is more, my company also makes QTZ7030,QTZ125 series,QTZ100 series,QTZ80 series,QTZ63 series,QTZ40 serie,QTZ50 series,QTZ31.5 series,QTZ25 series tower cranes, construction elevator, concrete pump, oncrete mixer, concrete mixer truck, screw conveyor...