Crane Development origin: history. Operation mechanism for horizontal transport of heavy or longitudinal adjustment of the position of the crane's work generally consists of motor, reducer, brake and wheel components. Luffing mechanism is equipped with only the jib crane, amplitude decreases Tadano 25 tons crane sales boom when looked when bent margin increased 25 tons of used Tadano cranes, sub balanced and unbalanced luffing luffing two kinds. Crane safety devices: Lifting Characteristics table. Set in the control room on the front side wall 25 tons Tadano crane factory, which lists the ratings of various arm lengths and various operating margin down from the weight and lifting height for inspection during operation. When the lifting operation, must not exceed the values ??specified in the table.