In the past, gears and conveyor belts were the main methods of rotary transmission, but now the use of couplings is becoming more and more widespread, and the methods and types of use are also increasing.

On the other hand, it is not uncommon for the device to malfunction due to damage to the coupling, resulting in major damage. Sometimes the rotary system of the device will bear an unexpectedly large load. Therefore, you must be careful when choosing and pay attention to improving the safety rate.

The size of the power to be transmitted (torque, rotational speed, inertia of the rotating body, etc.), the reversal frequency and its instantaneous rotational angular acceleration, the type and size of the inter-axis deviation (see Figure 1), space, and environment (water, oil, light) , electromagnetic waves, dust, ambient temperature, vacuum

(medium) condition, required rotation life... You must select items that meet your needs from these items and that are priced appropriately.