When installing gear couplings, they will be installed by hot-fitting or expansion sleeve clamping. Generally, hot-fitting is commonly used.

 Its characteristic is that it can ensure the fit between the shaft and the shaft hole of the coupling, and the contact will be closer. When 

hot-fitting the gear coupling, be careful not to adjust the gas welding temperature too high to avoid baking the shaft hole. If you stay in

 the shaft hole for too long, you must operate evenly and rhythmically.

The material of the gear coupling has been adjusted to a great extent and has good comprehensive mechanical properties. After quenching 

and tempering treatment, tempered sorbite is obtained. Due to hot baking, according to the principle of thermal expansion and contraction,

 do not use cold water to cool down after baking. Make sure the shaft and gear coupling are sealed after the coupling temperature is wiped 

off. Therefore, for high-frequency treatment, the coupling is heated to a specified temperature in a heating furnace, and the temperature of 

the workpiece is detected, and the coupling is taken out and turned over.

The curvature of the external teeth is relatively large. When transmitting torque between the two axes, the two axes will not be on the same 

horizontal line. The curvature radius of the drum curve is proportional to the unilateral thinning of the internal teeth, so the radius of the drum

 circle should be as large as possible. The curvature radius of the drum curve is proportional to the unilateral thinning amount of the internal 

teeth, that is, it is related to the meshing clearance of the teeth, which causes the internal and external teeth to crack, affecting the service life

 of the coupling.

When the tooth width coefficient is less than a certain value, the increase in its value has a greater impact on the increase in the degree of 

coincidence. When it is greater than this certain value, the increase in the value has a smaller effect on the increase in the degree of coincidence.

 For the arc drum, For curved gear couplings, the tooth width is still a parameter that determines the radius of the drum circle and the backlash; 

the drum-shaped tooth surface of the gear coupling improves the contact conditions between the inner and outer teeth and avoids the problem 

of angular displacement under the condition of angular displacement. The disadvantages of straight tooth edge extrusion and stress concentration.