You ll be using a 2 1 8 inch hole saw to drill the hole for the typical interior or exterior doorknob.
Interior door handle hole size.
The dewalt door lock installation kit helps you install door locks on wood and metal doors.
In most cases the door set which is inside of the door and controls the door latch.
Exterior doors are typically 1 3 4 inches thick while interior doors measure 1 3 8 inches thick.
The small hole along the edge of the door frame usually measuring about 1 inch in diameter.
Most interior locksets have a 2 and 3 8 inch backset.
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.
Cross or edge bore.
Lock spacing the distance between two locks.
Tape the template to the door and mark the centers of the lockset and barrel hole by making an indentation with the tip of a spade bit.
Fit into the door prep shown above.
Note that the template offers two possibilities for the barrel hole one for a 1 3 8 inch door and one for a 1 3 4 inch door.
The standard sized bore hole is 2 1 8 in diameter.
Measure from the center of the door knob hole to the edge of the doorway to find the size of the door set.
The bore hole is the large diameter hole where the door knob is mounted.
Through the edge of the door there is a 1 cross bore that extends from the edge of the door through the bore hole.
The center of this hole should be located 2 3 8 inches or 2 3 4 inches back from the edge of the door.
Exterior locksets commonly have a 2 and 3 4 inch backset.
It features two bi metal hole saws and a height alignment window for accuracy.
The latch will fit into the 1 inch hole.
The hole saw has a pilot bit that centers on the mark.
When replacing locks the latch backset needs to match the holes bored in the door.
This cross bore is where the latch is installed.
To know where to drill this hole from the edge of the door you need to know the backset of the lockset.
Choose the mark that corresponds to the door width.
The point where the two lines intersect is the center of the hole.
The two most common are 5 1 2 and 6 from the centers of the two holes.
It works for 2 3 8 in.
When boring deadbolt locks in a door there are two standards for spacing between the bottom lock and the deadbolt.
Mark the line at 2 3 4 inches for an exterior door.
Bore a 2 1 8 inch hole through the door.