Upgrading to euro locks greatly enhances the security of your home or business premises. Since they are the first line of defence against intruders, you'll want to make sure that they are safe and secure. There are various factors to consider- from lock picking resistance to anti-saw features. One of the most important is the Euro lock cylinder sizes. Euro cylinders come in different lengths and offsets. You need the right one to fit in your door. A small one will be ineffective and won't lock the door; while one that sticks out too far on the outside will be more vulnerable and an open invitation to burglars. Getting the right cylinder size will enable you to lace the correct order for your lock.

How To Remove The Existing Euro Cylinder For Measurement

It's not rocket science. It's easy and doesn’t require any special tools. A cross-head screw driver and simple metric ruler will do just fine. There are 2 ways to go about this. For the first one, you simply have to place the ruler against the open edge of your door. Judge the span of length from the outside face of one backplate to the cylinder's fixing screw, and then from the fixing screw to the other side off the backplate, using your eyes. You won't break a sweat, but it's not advisable. To get more accurate measurements, use the second method. It entails taking the cylinder out for a few minutes. First open the door and leave the key in it. Using the cross-head screwdriver, remove the fixing screw. This is the long screw that holds the cylinder in place. Its head should be visible just under the latch on the door' edge. Now turn the key while applying slight pressure on the opposite end of the cylinder. Turn it until you can feel the lock moving. Usually, the key just needs to make a turn either clockwise or anticlockwise. The cam will line up with the rest of the lock, thus enabling you to slide out the cylinder. 



Measuring Euro Lock Cylinder Sizes

Place the cylinder down on its side. Grab your ruler and measure from the left side of the cylinder to the centre of the fixing hole (Measurement A). Then measure from this centre to the right end (Measurement B). These measurements should be taken separately, and you only need the 2. Additionally, you can measure the overall length of the cylinder. It should be equal to the sum of measurements A and B. Your cylinder size is the ratio of measurements A and B. For instance, it A is 40mm and B is 45mm, your new euro lock cylinder will be a 40/45. In other words, it's an 85mm cylinder.

Determine What Size Cylinder You Need

This will be determined by the thickness of your door, and the type of handles that you'll be using. For example, if your door is 60mm thick, and the handle backplate is 10mm deep, you'll need a total length of 80mm (60+10+10mm). The 85mm cylinder would do well here, as it would allow the cylinder to have a small protrusion of 2.5mm on either side of the door. The small protrusion allows for slight tolerances when it comes to door thickness and fitting. It's also reduces vulnerability, thus enhancing the security of the lock, and it’s aesthetically pleasing.