The efficiency of a lead screw refers to how well a screw converts rotary energy (torque) into linear motion. Lead screw efficiency is a pure calculated value, and empirical testing is the best method to determine performance.
Efficiency % =
The efficiency of a lead screw is primarily influenced by these factors:
- Lead Distance – i.e. 1mm ~ 25mm (available leads).
- The efficiency is highly dependent upon the lead angle of the screw thread
- Lead Angle – The angle between the helix of the thread and a line parallel to the axis of rotation of the screw.
- Friction – Created by the contact area between the screw and the nut.
- Torque – Translating rotary to linear motion.
- Driving the screw to translate the nut .
- Driving the nut to translate the screw.
PBC Linear Lead screw Efficiencies