The formula to calculate the Total Torque is:
\[ T = \frac{2}{3} \cdot \mu_{\text{friction}} \cdot W_t \cdot R \]
Total Torque is the measure of the force that can cause an object to rotate about an axis. The Coefficient of Friction (μ) is the ratio defining the force that resists the motion of one body in relation to another body in contact with it. Load transmitted over bearing surface is the weight of load to be lifted. Radius of bearing surface is any of the line segments from its center to its perimeter, and in more modern usage, it is also their length.
Let's assume the following values:
Using the formula:
\[ T = \frac{2}{3} \cdot 0.4 \cdot 24 \cdot 3.3 = 21.12 \text{ Nm} \]
| Coefficient of Friction (μ) | Load Transmitted Over Bearing Surface (Wt) | Radius of Bearing Surface (R) | Total Torque (T) |
|---|---|---|---|
| 0.4 | 20 N | 3.3 m | 17.600000000000 Nm |
| 0.4 | 22 N | 3.3 m | 19.360000000000 Nm |
| 0.4 | 24 N | 3.3 m | 21.120000000000 Nm |
| 0.4 | 26 N | 3.3 m | 22.880000000000 Nm |
| 0.4 | 28 N | 3.3 m | 24.640000000000 Nm |
| 0.4 | 30 N | 3.3 m | 26.400000000000 Nm |