The coupling should pay attention to the following issues when designing and producing: 1. The weight and moment of inertia of the drum gear coupling are approximate values ​​calculated based on the minimum diameter and maximum length of the shaft hole. 2. D2 is greater than 465mm, and the sealing ring adopts a circular section. Rubber strips are bonded to form 3, J1 type shaft hole, according to need, the shaft end ring can be used without the shaft end ring 4, the keyway combination is: J/J1 type Y/Y1 type J1/Y type