How to know the size of the security door lock at home

The most accurate way to do this is to remove the cylinder and measure it.

The lock cylinder is easy to remove:

Tool: A Phillips screwdriver.

1. Disassemble the lock cylinder sequence:

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.

2.Remove the inner and outer lock cylinder caps: The screws are on the lock cylinder caps in the house, which are the left and right sides of the key.

3.Dismantle the lock cylinder positioning screw: The screw is on the side of the door, in the middle of the deadbolt, at the same height as the lock cylinder. The thickest one is.

4.At this time, the old cylinder can be removed: the old and new cylinders are the same, and they can be replaced.

Second, install the new lock cylinder:

The order is reversed from when dismantling, and there are a few points to note:

1.Before installing the new lock cylinder, add a small amount of special lubricant to the new lock cylinder. Turn the key several times repeatedly.

2.The lock cylinder positioning screw must be tightened to prevent the screw from loosening and opening the door in the future.

3.Do not tighten the screws of the lock cylinder cap too tightly to prevent screaming and it is not easy to unlock.

4.When installing the inner handle panel, there is a safety bolt underneath, which should be inserted into the corresponding safety bolt hole.

Suggestion: Try to use a super B-level lock cylinder (with a snake groove on the key).

The price of Taobao super B-grade lock cylinder is 70-100 yuan. If you find a professional repairer to replace it, it is generally 200 yuan.

Change the locks yourself, save money and be safe, and the first choice for the working class.

If you have a rich man, go to the repair master, they also have to live! It's scary for them to change careers.

If you want to change the locks, you only need 3 sizes:

The thickness of the door. The length and width of the lateral tab (the piece of iron at the deadbolt position).

The standard size of the household security door is 2050 * 960, the most standard is 2050 * 860, and there is 1970 * 960 1970 * 860, the security door is generally made according to the actual needs of the family, and the maximum can be 2500 * 2500.

The full name of the security door is "security door". It combines anti-theft and security performance. According to the provisions of the "General Technical Conditions for Anti-theft Security Doors", qualified anti-theft doors cannot be pried open within 15 minutes by using ordinary hand tools such as chisels, screwdrivers, crowbars and portable power tools such as hand drills, or open an opening of 615 square millimeters on the door leaf, or open an opening of 38 square millimeters in a semicircle of 150 square millimeters of locking points.

And the locks used on the anti-theft door must be a special lock for the anti-theft door with anti-drilling function that has been tested and qualified by the testing center of the Ministry of Public Security.

The anti-theft door can be made of different materials, but only the door that meets the standard test and receives the safety product production certificate can be called an anti-theft door.