Usually the backset measures 2 3 8 inches or 2 3 4 inches.
Measurements for door locks.
When measured to the spindle mechanism the backset then they translate as 44mm for the 65mm case and 57mm for the 76mm case.
All standard bored locks ansi 115 2 161 61l type for mortise lock ansi 115 1 86 type all locations must be altered 3 8 lower and standard strike asa type.
These sizes are the overall length of the latch or the case.
The distance between the edge of the door and the center of the lock hole.
Most of the current locks require the standard 2 1 8 bore.
Although they can come in different sizes the two most common sizes in the uk for internal door latches are 63mm and 76mm.
Use the smallest figure as your measurement.
That s the side without the lock if it s not an entry door and you re not sure.
2 3 8 inches and 2 3 4 inches.
In most cases the door set which is inside of the door and controls the door latch.
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.
Pack your locks with a 2 3 8 inch or 2 3 4 inch latch depending on which backset you specify.
Measure the width of the door in 3 locations.
Before purchasing a lock measure your door s backset cross bore and thickness to ensure you find the right fit.
This helps to ensure that your door will fit.
Opening heights 3 0 through 4 11 15 16 centered in door height not frame.
Measure the height of the door right in the middle.
Before you learn how to change door locks measure the space where you ll install the replacement.
1 measure from the center of the door knob hole to the edge of the doorway to find the size of the door set.
You ll want to measure sliding doors from outside of your home looking at the exterior of the door.
Many older doors had bores that were been smaller.
As for how to measure a door frame.
Measure from the floor to the underside of the trim at the top of the door.
In the united states there are two common backsets for residential door locks.
Cylinder door locks are not difficult to replace if you have basic diy skills you only need two measurements.
The standard bore is 2 1 8.
Measure from the inside edge of the trim on one side to the inside edge of the trim on the other side to get your jamb width if there s trim installed or simply measure the jamb if it s unadorned.
If you must it is always better to round down than round up.
If one wants to replace their locks on doors that have smaller diameter holes there are 2 options.
Shop door knobs handlesets.
Lock bore the diameter of the hole for the lock body.
Stand inside the open door facing the jamb.