Cylinder door locks are not difficult to replace if you have basic diy skills you only need two measurements.
Measuring a cylinder door lock.
Remove the euro cylinder if you are unsure see below for instructions on how to remove a euro cylinder lock.
Measuring for a new cylinder.
Sizes can reversible so for example 40 50 is 50 40 but not in all cases.
A the case depth.
Do not measure to the end of the black cam ring.
The backset is the distance from the edge of the door to the center of the 2 1 8 inch bore hole.
Usually the backset measures 2 3 8 inches or 2 3 4 inches.
If you marked the left side of the cylinder with a pencil then.
Before purchasing a lock measure your door s backset cross bore and thickness to ensure you find the right fit.
They can be fitted to your front and back doors and offer resistance to drilling picking bumping etc.
2 3 8 inches and 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.
Security brands such as yal.
In the united states there are two common backsets for residential door locks.
Https www locksonline co uk cylinder index html how to measure your lock faq an oval cylinder has an oval shape and is used in conjunction with an oval m.
Measure from the outside edge of the door including furniture to the centre of your door.
This is dimension a and is called the external size to centre.
This will show how simple it is using the diagram to the right.
This is the overall depth or length if you like of the horizontal lock body.
The distance between the edge of the door and the center of the lock hole.
They are versatile and most brands will fit any kind of upvc door as well as composite aluminium and patio doors.
Get measurement a measure from the left end of the cylinder to the centre of the fixing hole.
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.
Measuring horizontal locks is actually very straight forward.
How to measure a horizontal door lock.
Lay the cylinder down place cylinder on it s side for measuring.