The bore hole is the large diameter hole where the door knob is mounted.
Standard door handle hole size and position.
If one wants to replace their locks on doors that have smaller diameter holes there are 2 options.
Lock bore the diameter of the hole for the lock body.
Through the edge of the door there is a 1 cross bore that extends from the edge of the door through the bore hole.
If they are more than inch off the standard height you will want to match all of the pre existing door handle heights in your home.
Most of the current locks require the standard 2 1 8 bore.
The standard bore is 2 1 8.
Standard door preparation for door knob or lever handle.
Measure your existing door knobs from the floor up.
Installers typically drill the hole centered 36 inches above the floor if not specifically instructed to do so differently.
The standard sized bore hole is 2 1 8 in diameter.
In most cases the door set which is inside of the door and controls the door latch will.
Most interior doors are prepped with a single boor hole.
Generally the knobs should be of a free moving slide action.
It is more important that your door handles be consistent than that they match the standard door handle height.
Measure from the center of the door knob hole to the edge of the doorway to find the size of the door set.
Many older doors had bores that were been smaller.
Their position should be between 900mm 1050mm 35 5 41 5 inches above the floor.