Are standard size door locks

Measure cylinder lock door locks correctly

Step 1

2nd step

First measure the distance between the door and the cylinder end * on the outside. In the example opposite it is 15 mm 3rd step

Measure from the center of the cylinder (center of the fastening screw) to the edge of the door. In the example opposite it is 15 mm.

So you have the external dimension with 15 + 15 mm = 30 mm.4th step

On the inside, measure the distance between the door and the end of the cylinder. In the example opposite it is 10 mm.5th step

Measure from the center of the cylinder (center of the fastening screw) to the edge of the door. In the example opposite, it is 25 mm.

So you also have the inside dimension of 10 + 25 mm
= 35 mm.

In our door example, the dimension for the lock cylinder is A 30 / I 35.

If you have any questions in this regard, please do not hesitate to contact us.

Door lock cylinders can also be longer if necessary

If you buy a room door lock or want to buy door locks: Please note that when measuring the locking cylinder for the cylinder lock or door cylinder lock when installed, the door lock cylinders can be up to a millimeter longer with some manufacturers (are explained again on the respective product information pages). This is particularly important for doors without fittings (doors that are flat on the outside). For this purpose, the lock cylinders with an overall length of 27 or 28 millimeters are preferably used on the outside.
 

Door cylinder lock: anti-drill protection on the door fittingIf you buy door locks or want to buy a room door lock, anti-drilling protection is also very important. In our door example, an additional drill protection is mounted on the outside of the door with cylinder lock, which prevents the door lock cylinder from being drilled open. As you can see here, there is a metal plate on the cylinder above the keyhole. This can easily be rotated. A drill cannot reach the lock cylinder of the door cylinder lock because the metal plate rotates with the drill at the same speed.

This anti-drilling protection is not measured when measuring the lock cylinder.