How can I measure a cylinder lock?

Measure cylinder lock correctly

When you order a cylinder lock from us, you provide the correct dimensions of the cylinder. The length of the cylinder depends on the thickness of the door and the thickness of the door fittings.

Measuring a cylinder lock is not difficult. The length of a cylinder is measured from the center of the profile cylinder. See below for the correct method.

The best method to measure a cylinder lock is to take the profile cylinder out of the door and then measure it. To do this, you must remove the long mounting screw (side of the door at the level of the cylinder) from the door and you can pull the cylinder lock out of the door by turning the key slightly to the left or to the right.

You can now measure the length from the screw hole. You place the cylinder flat on the table and measure (in millimeters) from the center of the screw hole. Of course you do this from left and right.

Points of attention

• A cylinder may protrude a maximum of 3 mm from the outside of the door
• Not all cylinders in the same building are the same. Measure all cylinders to avoid one size not fitting.
• If the size is not correct, the order can be exchanged/returned within 30 days.

Keyed alike version

The standard length of a cylinder lock is 60mm, or 30mm on the left and 30mm on the right. The length can be extended by 5mm each time on both sides. With thicker doors, the lock is often not in the middle, so the length of the cylinder lock must be adjusted. We supply the desired cylinder locks in a keyed alike version. This allows you to open all doors with 1 key.

I want to replace my current cylinder, how do I measure it?

You do this by removing the current cylinder from the door and measuring it. To remove the old cylinder from the lock, loosen the screw that holds the cylinder in place. This screw is located on the front side of the door at the cylinder. It is important that you use a suitable Phillips screwdriver. Turning the screw to the left will release it and allow you to remove it completely from the door.

Now insert the key into the cylinder and turn it slowly. At the same time, pull the key towards you until you can remove the cylinder. In the case of a knob cylinder, do not use a key but perform this operation on the knob side. Because a cylinder has often been in use for years, the screw and/or cylinder may not come loose easily. In this case you can remove the door fittings, which often makes it easier to release the cylinder. If the screw is very tight, you can 'shock' it. You do this by tapping it with the hammer.

Now you can measure the cylinder

If the old cylinder fits well, you can of course order exactly the same size. If this is not the case, you can order the new cylinders longer or shorter. The easiest thing to do is to take the hole where the screw is in as a starting point. You measure from here – on both sides – to the outside of the cylinder.
NB! These can be different lengths.

When measuring a knob cylinder, it is important that you carefully check which side the knob should be placed on. With a knob cylinder you do not need to measure the knob. During the ordering process you can indicate the button side as 'inside'.

What if I have a door that does not yet have a cylinder in it?

In this case you also measure at the end of the door, so where the bolt comes out. You take the center of the lock as a starting point and measure the length to the inside and outside of the door. Don't forget to take the thickness of the door fittings into account.

Ready to order?

You now know which size you need and you can order your cylinder lock online. Are you still unsure or do you have any questions? Contact us and we will be happy to help you.