In large-capacity bridge girder erection machine, the magnification of the pulley unit is quite large. For example, it reaches 10 in a 200-ton crane and 12 in a 250-ton bridge. At the same time, it is selected. The rope may wish to withstand a load of 11 tons.

For bridge cranes, there are two parts to complete the cranes handed to users: the first part is the factory manufacturing part, the second part is the site installation part.

Overhead cranes are mechanical equipment that are horizontally mounted above workshops, warehouses and open storage yards, and are used to lift various objects. They are usually called "overhead cranes" or "traveling cranes". It is the most widely used lifting machine in the mechanical, metallurgical and chemical industries. In modern industrial enterprises, it is one of the important equipment to realize the mechanization and automation of the production process, reduce heavy physical labor, and improve production efficiency.

When your company's manufacturing processes or processes change, you may want to consider increasing the crane's load capacity. Increasing the load capacity of existing equipment is usually a more economical option than buying a new crane.

When we use a crane, the engine temperature may be too high, so what do we do? Let's take a look at the problem of excessive temperature in the crane engine.

Cranes that operate in orbit on the open track are generally affected by natural wind. The wind factor was taken into account in the design. When the wind is greater than the specified value, the crane stops working.