The utilization level and load status of the crane determine its work duty. Once the work duty is fixed, the crane has a certain number of working cycles under load — that is its working life. Generally, the working life of a bridge crane is 25 years for duty A3-A5 and 20 years for A6-A7. Any crane needs several overhauls throughout its life; during each overhaul, wearing parts such as wire ropes, rolling bearings, gears, wheels, brake friction plates, brake wheels and electrical equipment are replaced. Replacing these parts does not mean the end of the crane's working life. However, after many years of work, once severe fatigue cracks constantly appear on the structure and the crane or trolley can no longer work properly, the crane is considered unsafe. Therefore, the safe working life of a crane is mainly determined by how many years its metal structure works without fatigue cracks.

It is better not to exceed 120 cycles per day for continuous operation of a wire rope electric hoist. Exceeding this causes the motor to heat up too fast — the motor gets hot quickly, and continued use can burn the motor and scrap the hoist. Although some hoists can work longer, to extend the working life, it is better to keep operation within 120 cycles per day.

Answer: The price of the crane is determined by many factors, first of all is the steel structure, which directly determines the payload of the crane.

The cranes manufactured by our factory can fully meet 1.25 times of the national standard static test . All products can be statically tested.We can't conclude whether other manufacturers can reach it or not,we can only guarantee that our product quality is good;

Secondly, all of our wheels are heat-treated wheels with higher hardness and a better appearance, at a higher cost than other manufacturers. As far as I know, very few manufacturers use quenched wheels. All of our motors are three-in-one soft-start motors using high-precision gears and imported grease — they work quietly (better than ordinary motors with inverters), are maintenance-free, and have wear-resistant gears. All motors use high-temperature-resistant copper wire and aluminum alloy shells, offering light weight, high temperature resistance and corrosion resistance. The quality of all parts is a key factor in determining the price.

We can discuss this according to the specific situation. Manufacturing drawings are the core technology of our enterprise and, in principle, cannot be provided.

All cranes are customized according to the customer's workshop and outdoor usage. For customers with special requirements, we analyze and design according to the specific conditions.

The safety devices of a crane mainly cover two parts: lifting and travelling. Both parts have corresponding limit switch devices — these are essential accessories for cranes.

Cranes are special equipment, and installation must be carried out by qualified manufacturers and personnel. We suggest sending a professional engineer to help customers install and provide professional guidance to the customer's staff during installation. For countries we cannot travel to, installation is guided by phone and email. The most difficult part of crane installation used to be the electrical work; after years of experience, we have solved this with circuit diagrams and corresponding line numbers. The mechanical parts have matching marks on the structure, so customers can install by following the numbered marks.

By sea or land delivery — we can certainly solve it. Since the crane structure is welded from steel plates, we can separate it into two or three parts according to the span size, making it suitable for land or container delivery.

Many of our clients have workshops with limited space, and they can all use cranes. The crane can be designed according to the actual space of the workshop. Our technicians will help solve it once the client provides the detailed workshop dimensions.

Answer: The accessories for rail of overhead crane include: hook rail,  bolts for hook rail, clamping plates, and bolts for clamping plates;
the accessories for rail of the gantry crane include: clamping plates, bolts, and pressure plate.

Answer: Accessories for seamless bus bar include: brackets, hangers, tensioners, current collector
Tubular slide accessories include: brackets, hangers, connectors, and current collector       

We already manufacture the regularly used models and will have stock for your next purchase. For specially customized models, we do not keep stock, but we can design and manufacture according to your requirements.

At present, the electric hoist comes in two types. One is the ordinary wire rope electric hoist: Nanjing brand motor, Jiangyin gear reducer, and CHINT electrical parts. After decades of experience, as long as it is operated properly, there will be no problems within 5 years (except easily worn parts — we send those to customers free of charge). There is also a European-style hoist, whose motor can be imported according to customer requirements. The quality of both hoists is good.

The accessories differ according to the model of crane purchased, and we recommend accessories based on the model you want to buy.

We will send you the corresponding tool list according to the model of crane you buy.