How to change the lock core? How much is it?

1. How much does it cost to change a lock cylinder?

This is a common problem on the Internet. As far as I know, replacing a lock core is basically around 30-50 yuan, which is not very expensive, but I suggest you buy one and install it yourself. If you let the master pretend, you will be fine if you meet good intentions. If you encounter a black heart, it will probably cost 100 yuan to install.

Second, how to change the lock core of the security door?

1. Find the position of the lock cylinder screw hole and unscrew the lock cylinder screw.

2. Turn the key slowly until it reaches a certain position, that is, when the fork is in the lock core slot, the whole lock core can be pulled out of the lock body.

3. At this time, measure the size of the existing lock cylinder.

The common lock core is round head, with a diameter of 17mm, a width of 10mm and a height of 33mm.

If your lock cylinder has the same specifications, then determine the length of L 1 and L2.

Replace the lock cylinder, then tighten the lock cylinder screw, and then install the inner and outer handles. There are two screw holes in the handle in the room. Just tighten the screws.