1. What is Torsion Spring Calculation?

The torsion spring calculation determines the torque required for overhead doors based on the weight of the door and the radius of the drum. This helps in selecting the appropriate spring for smooth operation.

2. How Does the Calculator Work?

The calculator uses the torsion spring equation:

Where:

• \( \text{Torque} \) — Rotational force (N·m)
• \( \text{Weight} \) — Force exerted by the door (N)
• \( \text{Radius} \) — Distance from center to cable (m)

Explanation: The equation calculates the rotational force needed to counterbalance the weight of the door at a given radius.

3. Importance of Torque Calculation

Details: Proper torque calculation ensures the door operates smoothly, reduces wear on components, and prevents premature spring failure.

4. Using the Calculator

Tips: Enter the door weight in newtons and the drum radius in meters. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How do I convert pounds to newtons?
A: Multiply pounds by 4.44822 to get newtons (1 lb = 4.44822 N).

Q2: What's a typical radius for overhead doors?
A: Standard residential doors typically have a radius between 0.05m to 0.1m (2-4 inches).

Q3: Why is proper torque important?
A: Correct torque ensures balanced operation, prevents cable breakage, and extends spring life.

Q4: Should I add a safety factor?
A: Yes, professionals typically add 10-20% to the calculated torque for safety margin.

Q5: How often should springs be replaced?
A: With proper torque, springs typically last 10,000-15,000 cycles (about 7-12 years with daily use).