Measuring A Cylinder Door Lock

Measure edge to edge o for overall length of cylinder.

Measuring a cylinder door lock.

A euro cylinder lock is commonly fitted to upvc composite doors and is used with multi point locking systems and are also fitted to some mortice deadlocks and sashlocks on timber or aluminium doors. Pack your locks with a 2 3 8 inch or 2 3 4 inch latch depending on which backset you specify. Measure from the opposite edge of the cylinder b to the centre of the locking cam. This is dimension a and is called the external size to centre.

Now do exactly the same and measure the inner side i. This will ensure the euro cylinder protrudes from the backplate of the handle try to keep it as close to the backplate as possible. Measure from the outside edge of the door including furniture to the centre of your door. 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.

If dimension t 45 mm and dimension b 40 mm order a t45 40 cylinder dimension o 45 40 85 mm. Usually the backset measures 2 3 8 inches or 2 3 4 inches. 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. Screw hole x is the retaining screw for the euro.

Measuring for a new cylinder. How to measure the size of the euro cylinder lock barrel when in the door. 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. 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.

In the united states there are two common backsets for residential door locks. The distance between the edge of the door and the center of the lock hole. The t prefix denotes the thumbturn or inside part of the lock. 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 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. 2 3 8 inches and 2 3 4 inches. 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.