A chain link m/c having a blade of (330x52x6)mm on which steel wire is rotated of 4mm how much torque is reqd for amotor.

To calculate the torque required for a motor to rotate a chain link machine, we need to consider the properties of the blade and the steel wire being rotated. The torque required depends on factors such as the force required to cut through the material and the rotational speed of the blade.

Here's how you can calculate the torque required:

1. Determine the force required to cut through the material:
- The force required to cut through a material is determined by various factors such as the hardness and thickness of the material. This force is typically provided by the motor.
- The force required can vary based on the application and the specific material being cut. You will need to consult the specifications or technical data for the material being cut or refer to standard machining handbooks for approximate values.

2. Calculate the cutting torque:
- Once you have determined the force required to cut through the material, you can calculate the cutting torque using the following formula:
Torque (Nm) = Force (N) x Blade radius (m)

In this formula, the force should be in Newtons (N), and the blade radius should be in meters (m).
Note that the blade radius is half the width of the blade (Width/2).

- For example, if we assume a force of 1000 Newtons and a blade width of 52 mm, the blade radius would be 26 mm (52 mm / 2 = 26 mm). We need to convert this radius to meters by dividing by 1000 (26 mm / 1000 = 0.026 m).
Using the formula Torque = Force x Blade radius, the torque required would be:
Torque = 1000 N x 0.026 m = 26 Nm

3. Account for the wire diameter and other factors:
- Since you mentioned that the steel wire being rotated is 4 mm in diameter, you may need to consider the additional torque required to overcome the resistance of the wire.
- The torque required to rotate a cylinder (wire) can be calculated using the formula:
Torque (Nm) = Force (N) x Wire radius (m)

In this case, the force would be the tension force in the wire and the wire radius would be half the diameter (4 mm / 2 = 2 mm = 0.002 m). You may need to consult wire tension specifications or refer to relevant literature to determine the magnitude of the wire tension force.

4. Total torque required:
- Once you have obtained the torque required for both the blade and the wire, you can add them together to determine the total torque required for the motor.

Please note that these calculations provide an approximate estimation of the torque required. For accurate and specific results, it is recommended to consult with a mechanical engineer or refer to the technical specifications provided by the machine manufacturer.