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.
How to measure door lock size.
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.
Measure from the outside edge of the door including furniture to the centre of your door.
Euro locks are the uk s most common type of door lock in use today currently there are no required insurance standards which in our opinion is.
So you would measure the distance from the front face of the lock to the centre of the keyhole then again from the front face of the lock to the centre of the follower giving you two individual measurements.
This helps to ensure that.
The rough opening is typically about 1 1 2 wider than the unit size and about a 1 taller.
Use the smallest figure as your measurement.
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.
Double doors extra in width for t astragal.
In most cases the door set which is inside of the door and controls the door latch.
Next measure from the inside edge of your door including furniture to the centre of your door to find dimension b the internal size to centre.
If you must it is always better to round down than round up.
Bore a 2 1 8 inch hole through the door.
Measure the width of the opening stud to stud in 3 places the top middle and bottom and record the smallest measurement.
How to measure the size of the euro cylinder lock barrel when in the door.
Most of the current locks require the standard 2 1 8 bore.
The center of this hole should be located 2 3 8 inches or 2 3 4 inches back from the edge of the door.
The latch will fit into the 1 inch hole.
Measure the height of the door right in the middle.
1 measure from the center of the door knob hole to the edge of the doorway to find the size of the door set.
Measure the width of the door in 3 locations.
This is the backset dimension bore a 1 inch hole in the edge of the door located on the centerline of the 2 1 8 inch hole.
Many older doors had bores that were been smaller.
This is dimension a and is called the external size to centre.
If one wants to replace their locks on doors that have smaller diameter holes there are 2 options.
Measure from the floor to the underside of the trim at the top of.