1. What is Torque for Lifting?

The torque required to lift a weight with a bearing system depends on the mass being lifted, the radius at which the force is applied, and the efficiency of the bearing system. This calculation is essential for designing mechanical systems and selecting appropriate motors.

2. How Does the Calculator Work?

The calculator uses the torque equation:

Where:

• \( \tau \) — Torque (Nm)
• \( m \) — Mass being lifted (kg)
• \( g \) — Gravitational acceleration (9.8 m/s²)
• \( r \) — Radius at which force is applied (m)
• Efficiency — Bearing system efficiency (0-1)

Explanation: The equation accounts for the force needed to overcome gravity and the efficiency losses in the bearing system.

3. Importance of Torque Calculation

Details: Accurate torque calculation is crucial for selecting appropriate motors, designing mechanical systems, and ensuring safe operation of lifting mechanisms.

4. Using the Calculator

Tips: Enter mass in kilograms, radius in meters, and efficiency as a decimal between 0 and 1 (1 = 100% efficient). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical efficiency value for bearings?
A: Ball bearings typically have efficiencies between 0.95-0.99, while plain bearings might be 0.90-0.95.

Q2: How does radius affect the torque required?
A: Torque is directly proportional to radius - doubling the radius doubles the required torque.

Q3: Why include efficiency in the calculation?
A: No bearing system is 100% efficient due to friction. The efficiency factor accounts for these losses.

Q4: What safety factor should I use?
A: For critical applications, multiply the calculated torque by 1.5-2.0 as a safety margin.

Q5: Can this be used for angular acceleration calculations?
A: No, this only calculates static torque. For acceleration, you need to consider moment of inertia and angular acceleration.