Selecting the right torque for ground screw installation is one of the key factors affecting the quality and speed of installation. Equipment with insufficient power may struggle with dense soil, while overly powerful equipment may slow down the installation process due to a lower ground screw rotation speed. Let’s explore how to choose the optimal torque.
Key factors how of choosing torque for the ground screw driver:
1.Soil Type and Density
Soft and loose soils (sandy, peat) – torque of 5600–7000 Nm is sufficient.
Medium-density soils (loams, sandy loams) – optimal torque range is 7000–8700 Nm.
Dense soils (clay, hard loams, soils with rocky inclusions) – require torque of 8700–11000 Nm.
2.Ground screw diameter
The larger the diameter of the screw pile, the higher the torque required:
Up to 89 mm – 5600 Nm.
89–100 mm – 7000 Nm.
109–133 mm – 8700–11000 Nm, depending on the soil type.
133 mm and above – 8700–11000 Nm.
3.Ground screw installation speed
The higher the torque, the slower the ground screw installation speed. Additionally, as the torque increases, the hydraulic motor becomes heavier, which affects the overall weight of the drive head.
Final thoughts on torque selection for Ground Screw Machine
If you plan to work with different types of soil, a universal solution would be ground screw driver with 7000–8700 Nm. However, if projects require working in difficult conditions with big diameters of ground screws, it is better to choose 11000 Nm.
If you have any questions or need help selecting the right equipment, contact us and we will help you find the best solution for your needs!
