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.
Size of door handle hole.
The larger 2 and 1 8 inch hole is drilled first.
The center of this hole should be located 2 3 8 inches or 2 3 4 inches back from the edge of the door.
Bore a 2 1 8 inch hole through the door.
Measure from the center of the door knob hole to the edge of the doorway to find the size of the door set.
Use a jig or template to get it straight.
Choose the mark that corresponds to the door width.
After drilling the 2 1 8 inch bore hole center the 1 inch cross bore hole to penetrate through the edge of the door perpendicular into the larger hole.
The latch will fit into the 1 inch hole.
To know where to drill this hole from the edge of the door you need to know the backset of the lockset.
A common request we get around our shop is for door knobs or levers made for the small 1 1 2 or 1 5 8 bore hole.
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.
In most cases the door set which is inside of the door and controls the door latch.
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.
Actually while there are deadbolts available that are made specifically for the smaller bore today s knob and lever sets are for the most part made to fit the standard 2 1 8 door preparation.
There are a few exceptions and we ll discuss those here in a bit but there are no.
Without this pilot bit the hole saw would wander across the face of the door as you start to drill the giant hole.