China crane machine overload factor
In the current crane industry standards, there is no clear definition of overload factor. Normally, overhead cranes and gantry cranes regular manufacturers are equip the crane machine with load limiters. When the lifting capacity reaches 90% of the rated load, an early warning signal is issued. When the lifting capacity reaches 100% of the rated load, a long beep signal is issued. In general, the overhead crane and gantry crane overload factor is 20%, however, this is a compelling case to consider, do not try it. Under this situation, the crane machine operation safety is often not guaranteed, prone to accidents.
In many cases, it is difficult to measure the lifting goods weight reach the rated capacity or not, such as 5 ton single girder gantry crane, lifting capacity how to estimate? It is hrad for the staffs to estimate the lifting goods weigh with the naked eye, they can not judge weather the lifting goods is more than 5 ton or not.
Therefore, the crane machine should be equipped with torque limiter, it can be read out by the instrument. Moreover, if an accident occurs during operation, can check the instrument data to determine whether it is a problem of crane machine or a mistake of the worker, then make a construction adjustment, raise the crane machine rated load, or replace a more professional operator.