What Is Overhead Crane?

An overhead crane, often known as a bridge crane, is a key industrial lifting system for heavy-load handling in facilities like factories, ports, and warehouses. Available for single girder overhead crane (for lighter loads, 1-32 tons) or double girder overhead crane (for heavier tasks, 5-500 tons) or KBK Light flexible crane (for processing lines, less than 5 tons). It uses overhead structure to save space and avoid ground congestion.

Next, this article will delve into the definition, image, application, structure and technical specifications of an overhead crane to help you have an overall understanding of it.

What Is An Overhead Crane?

An overhead crane is a heavy-duty lifting device installed above work areas (e.g., factories, warehouses) on fixed overhead rails. Unlike mobile cranes, it operates along a fixed path, saving ground space. Its basic components include main girders (the load-bearing structure), end trucks (for longitudinal movement), a hoist trolley (for lateral movement) and a hoisting mechanism (for vertical lifting) and a Control System (for easy and precise operation).

An overhead crane's core structure includes a bridge-frame main girder spanning the workspace. The main girder is supported by end trucks that run on overhead rails. A movable hoist trolley on the girder enables vertical lifting (via a hoisting mechanism) and horizontal movement of loads. Controlled via a cab, remote, or pendant, it boosts efficiency and safety. Designed for precision and safety, it's widely used in industrial settings to move bulky, heavy items that manual labor or small tools cannot manage, ensuring efficient material handling.

What Is An Overhead Crane Used For?

Overhead cranes serve critical roles across three key industries, each leveraging their load capacity and space efficiency:

Manufacturing: In automotive workshops or machinery plants, they handle heavy components, such as lifting engine blocks for car assembly or moving large machines. They ensure precise placement, reduce worker injury risks and speed up assembly lines by replacing most manual operation work.

Warehousing & Logistics: In distribution centers or shipping yards, they load/unload heavy pallets, containers, or bulk goods (e.g., grain, chemicals) from trucks/trains. By using overhead space, they maximize storage area and avoid ground congestion, streamlining goods transfer between storage and transport.

Heavy Industry: In paper mills or steel mills, they manage heavy, harsh-environment tasks, e.g., moving molten steel ladles, lifting steel coils (50-200 tons) or positioning ship hull segments. Their high durability and load capacity make them essential for safe, continuous operation in high-intensity settings.

Overhead Cranes Structure

An overhead crane's functionality relies on five core components: the main girder, the end truck, the hoist trolley, the hoisting mechanism and the control system. These parts work together to achieve cargos lifting and handling. This is a detailed description of the function of each component:

Main Girders: The horizontal, bridge-like structure spanning the workspace. It bears the total load (trolley + lifted items); single-girder designs suit lighter loads (≤20 tons), while double-girder designs (two parallel girders) handle heavier tasks (≥20 tons) with greater stability.

End Trucks: Mounted at each end of the main girders, they have wheels that run along overhead rails. They power the crane's longitudinal (back-and-forth) movement across the workspace.

Hoist Trolley: A movable unit that travels along the main girders (transverse, side-to-side movement). It carries the hoisting mechanism, enabling precise lateral positioning of loads.

Hoisting Mechanism: The "lifting core"-includes a motor, wire rope/drum, and hook. It drives vertical lifting/lowering of loads, with speed and weight capacity tailored to the crane's design.

Control System: Operated via a cab (for large cranes), remote, or handheld pendant. It regulates all movements (lifting, trolley, end truck travel) to ensure safe, precise operation, often with safety features like overload protection.

Overhead Crane Specification

Single Girder Overhead Crane Specification

Notice: The items listed only for reference. Customizable solutions are available.

Double Girder Overhead Crane Specification

Notice: The items listed only for reference. Customizable solutions are available.

Overhead Crane Manufacturer

Minecrane, a professional Overhead Crane manufacturer and supplier in China, always focuses on engineering safety and driving technological innovation. We are always committed to providing our customers with practical and efficient solutions.

We not only offer overhead cranes, but also provide diversified material handling and lifting customized solutions, including gantry cranes, Jib crane and other crane parts according to customers' needs.

If you have any specific requirements or need further assistance, please feel free to contact our team of experts. Minecrane will provide you with satisfactory solutions and professional support.