How to solve the noise of security door

There is noise in the security door, which may be caused by many reasons. Here are some possible reasons and solutions:

The friction between the bearing and the hinge results in that proper lubricating oil can be directly applied around the bearing and the hinge to reduce the friction.

Cause of bearing damage: If there is something wrong with the bearing, replace it with a new one.

The gap between the door frame and the door leaf is too small: you can try to make the gap between the door frame and the door leaf bigger, or put a wooden square in the gap.

The security door has been used for a long time, so you can consider replacing it with a new one.

Loose or damaged bumper: the bumper can be fixed with super glue or replaced with a new bumper.

The lock tongue is stuck: just paint the lock tongue with pencil powder.

If the above methods can't solve the problem, it is recommended to consult the property or professional maintenance personnel.