- Date: 2025.08.11
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In the field of engineering lifting equipment, the KB 3-ton spider crane is particularly eye-catching for its world-first dual-speed winch technology. So, why does the KB spider crane use a dual-speed winch design? How does it differ from ordinary cranes? What are the advantages of this design?
Why did KB develop a dual-speed winch? The goal is to balance crane efficiency and safety—stability and safety when loaded, efficiency and speed when unloaded. Traditional single-speed winches often compromise: using a low-speed design to ensure load safety significantly increases the unloaded round-trip time; choosing a high-speed mode for improved efficiency can lead to excessive inertia when loaded, causing shaking and even safety hazards. KB's dual-speed winch uses an intelligent switching mechanism to match the equipment to the optimal speed for different operating conditions.
Compared to ordinary cranes, the dual-speed winch system of the KB spider crane offers significant advantages. In terms of operational efficiency, a single-speed winch system on an ordinary crane cannot meet the speed requirements of cargo lifting. However, the dual-speed winch system on the KB 3-ton spider crane offers a hook speed of 7 meters per minute when loaded and 12 meters per minute when unloaded, a 71% increase compared to loaded conditions. This significantly reduces non-operating time and significantly improves work efficiency.
This dynamic adjustment capability brings three core advantages: first, efficiency is doubled. In frequent lifting scenarios such as building decoration and equipment installation, the average daily number of operation cycles increases; second, energy consumption is optimized. By adjusting the output power to match the load demand, energy is saved compared to traditional equipment; and finally, safety is upgraded. The low-speed design under load can reduce the swing amplitude of the hook and significantly reduce the risk of lifting.