Transmittable torque

Transmittable torque is the maximum force that a connection, such as a coupling, bolted connection or shaft-hub connection, can transmit before slippage or failure occurs. It is crucial for the design and dimensioning of machine components to ensure that they can withstand operational requirements and work efficiently.

Factors influencing the transmittable torque

Several factors influence the transmittable torque:

1. Friction: Friction between the contact surfaces plays a significant role. Higher coefficients of friction lead to a higher transmittable torque.
2. Surface finish: Smoother surfaces can lead to lower friction and therefore lower torque.
3. Material of the components: Harder materials can transmit higher forces.
4. Force fit and form fit: The type of connection, whether by force fit (e.g. screws) or form fit (e.g. keyways), influences the torque transmission.
5. Operating conditions: Temperature, vibrations and lubrication can influence the transmittable torque.

Calculation of the transmittable torque

The calculation of the transmittable torque requires the consideration of several parameters:

1. Coefficient of friction: A higher coefficient of friction increases the transmittable torque.
2. Contact pressure: The force with which the contact surfaces are pressed together directly influences the torque.
3. Diameter of the connection: Larger diameters increase the transmittable torque due to the larger lever arm.

Application areas of the transmittable torque

The concept of transmittable torque is of great importance in many areas of mechanical engineering:

1. Drive technology: In gearboxes, clutches and motors for efficient power transmission.
2. Vehicle technology: When connecting drive shafts and axles.
3. Manufacturing industry: In machine tools for transmitting high forces between tools and workpieces.
4. Energy technology: In wind power plants and turbines for transmitting large torques to the generators.

Optimization of the transmittable torque

Various measures can be taken to optimize the transmissible torque:

1. Choice of materials: Use of materials with higher strength and friction.
2. Surface treatment: Roughening or coating the surfaces to increase friction.
3. Design changes: Adjusting the diameter or shape of the connection.