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Screw Torque to Force Formula:
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The screw torque to force equation calculates the linear force generated by a screw mechanism based on the input torque, screw efficiency, and lead. This is essential in mechanical engineering applications involving screw jacks, linear actuators, and other screw-based mechanisms.
The calculator uses the screw torque to force formula:
Where:
Explanation: The equation converts rotational torque into linear force, accounting for the mechanical efficiency of the screw system and the lead (distance the screw advances per revolution).
Details: Accurate torque to force conversion is crucial for designing mechanical systems, calculating load capacities, determining actuator requirements, and ensuring safety in screw-based mechanisms.
Tips: Enter efficiency (0-1), torque in N·m, and lead in meters. All values must be positive numbers. Efficiency typically ranges from 0.3 to 0.9 depending on screw type and lubrication.
Q1: What is screw efficiency?
A: Screw efficiency (η) represents how effectively the screw converts rotational torque into linear force, accounting for friction and other energy losses.
Q2: How is lead different from pitch?
A: Lead is the linear distance the screw advances per revolution, while pitch is the distance between threads. For single-start screws, lead equals pitch.
Q3: What are typical efficiency values?
A: Ball screws: 0.8-0.9, Acme screws: 0.3-0.5, Square threads: 0.4-0.6. Efficiency depends on material, lubrication, and thread design.
Q4: Can this formula be used for all screw types?
A: This formula works for most screw types, but efficiency values vary significantly between different screw designs and materials.
Q5: How does friction affect the calculation?
A: Friction is accounted for in the efficiency factor. Lower efficiency values indicate higher friction losses in the screw system.