How to control the lifting speed of screw jack?
Nov 14 , 2025
The speed of a acme screw jack is a crucial parameter in application selection. It not only affects the equipment's operational efficiency but also relates to the matching and calculation of motor power and torque. Therefore, the lifting speed must be carefully considered when determining the screw jack solution.
Controlling the speed of a worm screw jack hinges on the selection and control of its drive source. Screw jacks can be driven by hand cranks, electric motors, etc. The input speed and screw lead are the main factors determining the lifting speed. Speed variations can be achieved by adjusting the input speed; variable frequency motors and servo motors can easily meet various speed requirements. It is important to note that each screw jack has its allowable input speed and torque; adjustments must be made within the maximum allowable speed and torque range. Exceeding these limits can cause overheating and wear-related malfunctions.
Alternatively, speed variations can be achieved by adjusting the lead. A larger screw lead results in a longer linear displacement per revolution, thus increasing the lifting speed, especially in manual operation. However, it is important to note that screws with large leads cannot self-lock, reducing accuracy. Furthermore, increasing the lead involves non-standard machining, which can affect delivery time and cost; therefore, it is essential to communicate with the manufacturer in advance to confirm the specifications. Each method has its advantages and disadvantages, so a comprehensive consideration is necessary. To ensure the safe, stable, and efficient operation of the machine screw jack, the appropriate solution and model should be selected based on a balanced assessment of the specific requirements of the application.
For more information on selection calculations using our extensive case studies, please consult our technical staff. We can provide model drawings and other relevant information to determine the best option based on your specific working conditions and requirements.
