... efficiency perfectly 3.Low operating cost 4.Easy to maintenance new research ton overhead crane can reach the capacity 500ton Design ... .5/0.35) 8(7)Lifting height(m)6,9,12,18,24,30Traveling speed(m/min)20,30Motor Cone-squirrel-cage ... 5 years.Welcome the customers from all over the world. new research ton overhead crane can reach the capacity 500ton