Light-duty lifting systems encompass a wide range of products, including five mainstream categories: KBK flexible lifting systems, LD light-duty single-girder cranes, jib cranes, portable light-duty gantry cranes, and electric hoists. These systems differ significantly in terms of rated load, operating span, operation mode, spatial adaptability, and operational efficiency. When selecting equipment, industrial enterprises risk issues such as overloading, insufficient efficiency, spatial incompatibility, and resource waste if they choose blindly. This article outlines systematic selection criteria and differentiated solutions based on core technical parameters and operational characteristics, catering to various workshop conditions, operation frequencies, and spatial constraints.
The KBK flexible rail lifting system is a core piece of light-duty lifting equipment for lean production. It offers rated loads ranging from 0.125t to 2t and features a flexibly adjustable operating span. Its rails can be spliced, curved, and configured into multi-level, three-dimensional layouts, making it ideal for continuous assembly line operations and multi-point lifting tasks. The system is lightweight, easy to install, and requires no heavy civil engineering foundations; it offers low running resistance, smooth start-stop performance, and high positioning accuracy. With a duty classification of A1–A2, it is well-suited for high-frequency, light-load, and high-precision scenarios such as precision assembly, electronics manufacturing, and the transfer of small components. Its key advantages are high space utilization and layout flexibility—rail paths can be adjusted at will to match production line layouts—though it has limited heavy-load capacity and is unsuitable for lifting loads exceeding 2t.
The LD light-duty electric single-girder crane is a primary workhorse in the light-to-medium lifting category, offering rated loads of 2t to 10t and a maximum operating span of up to 30m. It utilizes an I-beam main girder paired with an electric hoist mechanism to enable wide-area, long-distance, three-dimensional lifting operations within the workshop. With a duty classification of A2–A3, it is suitable for medium-frequency, medium-to-light load applications, including machining, component transfer, and general workshop lifting tasks. This equipment offers high load-bearing capacity, an extensive operating range, and excellent cost-performance, making it suitable for routine operations in fixed workshops. Its drawbacks include the need for structural rail supports—resulting in higher civil engineering and installation costs compared to KBK systems—and relatively limited flexibility; it is best suited for production scenarios involving fixed workstations or designated work zones.
Light-duty jib cranes come in three variants: pillar-mounted, wall-mounted, and mobile. They feature rated loads ranging from 0.25t to 8t and operating radii of 3m to 8m. By rotating the jib arm, they cover an arc-shaped work area while occupying minimal space, making them ideal for dedicated single-workstation lifting tasks. The pillar-mounted type offers 360° rotation and the highest load capacity, suitable for machine tool loading/unloading and equipment assembly at a single station. The wall-mounted type eliminates the need for a pillar, saving floor space and suiting side-wall operations in cramped workshops. The mobile type features a counterweighted base, requiring no fixed installation and allowing for flexible relocation; it is suitable for temporary lifting and rotating operations across multiple workstations. The core advantages of jib cranes are their station-specific focus and operational flexibility, while their limitations lie in a restricted operating range that prevents large-scale, continuous material transfer.
Mobile light-duty gantry cranes and electric hoists serve as key auxiliary equipment. Mobile gantries offer rated loads of 1t to 5t, allow for free movement and rapid deployment, and are suitable for temporary construction sites, equipment maintenance, and sporadic workshop lifting tasks. Wire rope or chain electric hoists act as the lifting units; compatible with various rails and support structures, they serve as the core lifting components of light-duty systems. Selection should follow these principles: choose KBK systems for light-load, high-precision, or assembly-line scenarios; select LD single-girder cranes for medium-load, wide-area, or general workshop applications; opt for jib cranes for high-frequency, single-station tasks; and choose mobile gantries for temporary, sporadic operations. Precise matching based on the four key parameters—load, span, frequency, and space—maximizes equipment efficiency.
