1. What is a Lead Screw Torque Calculator?

Definition: This calculator estimates the torque required for a lead screw based on axial force, screw pitch, and mechanical efficiency.

Purpose: It helps engineers and designers determine the appropriate motor torque needed for lead screw applications in linear motion systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Torque (Newton-meters)
• \( F \) — Axial force (Newtons)
• \( P \) — Lead screw pitch (meters)
• \( \eta \) — Mechanical efficiency (decimal, 0-1)

Explanation: The axial force multiplied by pitch gives the work per revolution, which is then divided by 2π and efficiency to account for energy losses.

3. Importance of Torque Calculation

Details: Proper torque estimation ensures proper motor sizing, prevents system failures, and optimizes energy efficiency in linear motion systems.

4. Using the Calculator

Tips: Enter the axial force in Newtons, lead screw pitch in meters (default 0.005m or 5mm), and efficiency (default 0.9 or 90%). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical lead screw efficiency?
A: Ball screws typically have 90% efficiency (η=0.9), while ACME screws might be 30-70% efficient depending on materials and lubrication.

Q2: How do I convert pitch from mm to m?
A: Divide mm by 1000 (e.g., 5mm = 0.005m). The calculator expects pitch in meters.

Q3: What affects lead screw efficiency?
A: Screw type (ball vs ACME), materials, lubrication, wear, and load all affect efficiency.

Q4: How do I find the axial force?
A: Calculate from the mass being moved (F = m × a) plus any friction forces.

Q5: Does this include safety factors?
A: No, consider multiplying the result by 1.5-2x for safety margin in real applications.