Q&A(FAQ) What is the tightening torque?
The recommended tightening torque for terminal block screws is shown below.
Please verify these values with your actual equipment.
1. For Terminal Block
| No. | Screw diameter | Recommended Torque | No. | |
|---|---|---|---|---|
| [N·m](SI unit) | Torque [kgf·cm] | |||
| 1 | M3 | 0.36 - 0.49 | 3.7 - 5.0 | |
| 2 | M3.5 | 0.64 - 0.8 | 6.5 - 8.8 | |
| 3 | M4 | 1.0 - 1.2 | 9.6 - 12.8 | |
| 4 | M5 | 1.9 - 2.4 | 19.0 - 25.0 | |
| 5 | M6 | 3.3 - 4.3 | 33.5 - 44.0 | |
| 6 | M8 | 8.1 - 10.7 | 82.0 - 110.0 | |
2. For mounting holes (aluminum chassis)
| No. | Screw diameter | Recommended Torque | No. | |
|---|---|---|---|---|
| [N·m](SI unit) | Torque [kgf·cm] | |||
| 1 | M3 | 0.36 - 0.49 | 3.7 - 5.0 | |
| 2 | M3.5 | 0.64 - 0.8 | 6.5 - 8.8 | |
| 3 | M4 | 1.0 - 1.2 | 9.6 - 12.8 | |
| 4 | M5 | 1.9 - 2.4 | 19.0 - 25.0 | |
| 5 | M6 | 3.3 - 4.3 | 33.5 - 44.0 | |
| 6 | M8 | 8.1 - 10.7 | 82.0 - 110.0 | |
3. For Mounting hole (Steel plate)
| No. | Screw diameter | Recommended Torque | No. | |
|---|---|---|---|---|
| [N·m](SI unit) | Torque [kgf·cm] | |||
| 1 | M3 | 0.46 - 0.6 | 4.7 - 6.3 | |
| 2 | M3.5 | 0.79 - 1.08 | 8.1 - 11.0 | |
| 3 | M4 | 1.2 - 1.5 | 12.0 - 16.0 | |
| 4 | M5 | 2.4 - 3.0 | 24.0 - 31.0 | |
| 5 | M6 | 4.2 - 5.4 | 42.0 - 56.0 | |
| 6 | M8 | 10.1 - 13.4 | 103.0 - 137.0 | |