Can the fire door be replaced with the lock cylinder of the anti theft door?

The size of the lock cylinder of the anti-theft door, if you have a strong hands-on ability, you can remove it and measure it, based on the distance between the middle screw hole and the two keyholes, of course, if you are troublesome, you can simply measure it, as shown in the figure below, you only need to measure L1 + L2. >>>More

It depends on what kind of lock you get, some are of good quality and some are of average quality. Under normal circumstances, not the whole lock is changed together, and the lock cylinder is changed more, the general forty or fifty can be, and the better ones are seventy or eighty. Generally, when you go to find a lock to change the lock cylinder, it is installed in a package. >>>More

It can still be replaced, but the engineering aspect is very cumbersome, and the door frame and wall of the security door are connected with cement, so that it will be more firm. If you want to remove the security door, you must break it together with a ring of walls next to it to remove it. Then if you change the door to a new one, you have to re-lay bricks and plaster cement to repair. >>>More

It's easy. Sequence of disassembling the lock cylinder:

1.Remove the inner and outer handle panels: Screw on the handle panel in the house, one on the top and one on the bottom. >>>More

Personally, I don't think it makes sense for you to do this for the following reasons: >>>More