The two main types of stringing machines are:

• Hydraulic Pullers: These machines use a hydraulic system to generate pulling force. They are characterized by their bullwheels (large grooved wheels) or capstans that grip and pull the rope/conductor.

  • Applications: Primarily used to pull pilot ropes, then the main conductors, across spans. They are essential for long-distance stringing, pulling multiple conductors simultaneously (bundle stringing), and re-conductoring projects. They offer precise speed control and overpull protection.

• Hydraulic Tensioners: These machines are designed to pay out conductor under controlled tension. They also feature bullwheels or friction brakes to regulate the back tension.

  • Applications: Critical for tension stringing, preventing the conductor from touching the ground, ensuring consistent sag, and minimizing damage during installation. They are used in conjunction with pullers to maintain a continuous tensioned system.

  • Puller-Tensioners: Some machines combine both functions, capable of acting as a puller or a tensioner, offering versatility for various project phases or smaller operations.