1. What is Screw Axial Force?

Screw axial force refers to the linear force generated along the axis of a screw when torque is applied. This force is crucial in mechanical systems where screws are used for fastening, lifting, or applying pressure.

2. How Does the Calculator Work?

The calculator uses the screw axial force formula:

Where:

• \( F \) — Axial force (N)
• \( T \) — Applied torque (Nm)
• \( \eta \) — Mechanical efficiency (dimensionless)
• \( L \) — Lead of the screw (m)

Explanation: The formula calculates the linear force generated by a screw mechanism based on the input torque, screw efficiency, and lead distance.

3. Importance of Axial Force Calculation

Details: Accurate axial force calculation is essential for proper screw selection, ensuring structural integrity, preventing over-tightening, and optimizing mechanical system performance.

4. Using the Calculator

Tips: Enter torque in Nm, efficiency as a decimal (0-1), and lead in meters. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is mechanical efficiency in screw systems?
A: Mechanical efficiency represents how effectively the screw converts rotational torque into linear force, accounting for friction losses.

Q2: How does lead affect axial force?
A: A smaller lead produces greater axial force for the same input torque, but requires more rotations to achieve the same linear travel.

Q3: What are typical efficiency values for screws?
A: Efficiency typically ranges from 0.3 to 0.9, depending on thread design, lubrication, and materials used.

Q4: Can this formula be used for ball screws?
A: Yes, the same formula applies, though ball screws typically have higher efficiency values (0.8-0.95) compared to traditional screws.

Q5: How accurate is this calculation?
A: The calculation provides theoretical values. Actual results may vary due to friction, wear, and other real-world factors.