What is the operating accuracy of a worm gear screw jack?
Dec 12 , 2025
The operating accuracy of a worm gear screw jack is determined by several factors, including:
Material Selection: High-quality materials are crucial for ensuring the accuracy and lifespan of the screw jack. For example, the worm is typically made of high-quality steel such as 40Cr and undergoes tempering heat treatment, while the worm wheel is made of high-quality copper (9-4/10-1). This material selection ensures that the screw jack maintains high accuracy even under heavy loads.
Structural Design: The structural design of the screw jack actuator determines its deceleration and torque amplification functions, thus affecting its operating accuracy. This structural design allows for the lifting of objects even with minimal force.
Machining Accuracy: The machining accuracy of the screw is one of the key factors affecting the operating accuracy of the cubic acme screw jacks. Errors during machining can lead to deviations in the screw pitch, thus affecting the accuracy of the screw jack. To control this error, Rude Transmission uses advanced machining equipment and processes, such as machining centers and CNC machine tools, to process the various key components of the screw jack. Positioning Accuracy: Positioning accuracy is primarily caused by the backlash of the worm gear. The forward and reverse rotation of the input shaft will generate a certain amount of free travel. This error can be reduced by optimizing the design of the worm gear and using high-precision bearings.
Screw Type: Different types of screws (such as trapezoidal screws and ball screws) have different accuracy characteristics. Ball screws generally have higher machining and positioning accuracy than trapezoidal screws; therefore, in applications with high requirements, Lude Transmission will design and select ball screws according to specific requirements.
In conclusion, the operating accuracy of a screw jack is determined by multiple factors, including material selection, structural design, machining accuracy, positioning accuracy, and screw type. To ensure high accuracy of the screw jack, comprehensive consideration and optimization of these aspects are necessary.
