Efficiency, Thrust and Torque
The friction coefficient of change nuts (μ) is approximately 0.1 to 0.2 as a guideline. The efficiency (η) with the friction coefficient at 0.1 to 0.2 is Table2 .
*The friction coefficient may exceed the above-mentioned value depending on the lubrication and mounting conditions, so the value shall be used as a reference.
Table2 Friction Coefficient and Efficiency
| Frictional coefficient (μ) | 0.1 | 0.15 | 0.2 |
|---|---|---|---|
| Efficiency (η) | 0.82 | 0.74 | 0.67 |
The thrust generated when a torque is applied is obtained from the following equation.
| Fa | Thrust generated (N) |
|---|---|
| T | Torque (input) (N･m) |
| R | Lead (mm) |
Also, the torque generated when a thrust is applied is obtained from the following equation.
| T | Torque generated (N･m) |
|---|---|
| Fa | Thrust (input) (N) |
| R | Lead (mm) |
