Professional Answer (On behalf of Ningbo Changshi): Our range of cable pulling capstan winches offers a wide variety of pulling capacities to meet the diverse needs of power line and underground cable projects. The pulling capacity is a critical specification that is determined by several factors:

• Engine/Motor Power: The power source (diesel, petrol, electric, or hydraulic) directly influences the maximum pulling force the winch can generate.

• Gearbox and Gearing Ratio: The design of the gearbox and the gear ratio determine how the engine's power is converted into the pulling force and speed.

• Capstan Drum Diameter: The diameter of the capstan drum affects the pulling speed and force, with a larger drum typically providing faster line speed at the expense of some pulling power.

• Rope Type and Diameter: The type and condition of the rope, as well as its diameter, are crucial. We specify the optimal rope for each winch to ensure maximum performance and safety.

We manufacture winches with pulling forces from a few hundred kilograms for lighter duties to several tons for heavy-duty transmission line stringing. Our product specifications page and technical support team can provide precise details on the capacity of each model to match your project's exact requirements.