Measuring A Cylinder Door Lock

This will ensure the euro cylinder protrudes from the backplate of the handle try to keep it as close to the backplate as possible.

Measuring a cylinder door lock.

If you re measuring for a new door you ll need to consider the door s width and any door furniture such as handles or escutcheons. Choose the right lock to fit your door before purchasing a lock measure your door s backset cross bore and thickness to ensure you find the right fit. Measure from the centre of the screw hole x to the edge of the handle backplate on the outside o and round up the size to the next 5mm increment i e. This is dimension a and is called the external size to centre.

Your cylinder locks should be as flush as possible with the handles maximum projection is 5mm if you current lock sticks out by more than 5mm either side of the hanldes then choose a smaller size. The second measurement should be taken from the centre of the screw to the other edge of the cylinder take a closer look below at our easy to fit euro cylinder lock. There are many different case depths but the most common sizes are 64mm and 76mm. See our how to measure your euro cylinder lock diagram the first measurement should be taken from the edge of the cylinder to the centre of the screw.

How to measure the size of the euro cylinder lock barrel when in the door. Measure from the opposite edge of the cylinder b to the centre of the locking cam. The backset is the distance from the edge of the door to the center of the 2 1 8 inch bore hole. The case depth is what would commonly be referred to as the lock size.

Usually the backset measures 2 3 8 inches or 2 3 4 inches. 2 3 8 inches and 2 3 4 inches. Whilst not all locks follow the same template nine times out of ten other measurements can be correctly assumed based on the case depth. In the united states there are two common backsets for residential door locks.

If dimension t 45 mm and dimension b 40 mm order a t45 40 cylinder dimension o 45 40 85 mm. Measuring for a new cylinder. Pack your locks with a 2 3 8 inch or 2 3 4 inch latch depending on which backset you specify. The t prefix denotes the thumbturn or inside part of the lock.

Now do exactly the same and measure the inner side i. Screw hole x is the retaining screw for the euro. Measure edge to edge o for overall length of cylinder. The distance between the edge of the door and the center of the lock hole.

Cylinder door locks are not difficult to replace if you have basic diy skills you only need two measurements.