To know where to drill this hole from the edge of the door you need to know the backset of the lockset.
Size of door handle hole.
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.
Without this pilot bit the hole saw would wander across the face of the door as you start to drill the giant hole.
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.
In most cases the door set which is inside of the door and controls the door latch.
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.
Fit into the door prep shown above.
There are a few exceptions and we ll discuss those here in a bit but there are no.
The latch will fit into the 1 inch hole.
Choose the mark that corresponds to the door width.
Measure from the center of the door knob hole to the edge of the doorway to find the size of the door set.
Bore a 2 1 8 inch hole through the door.
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.
The placement of the cross bore hole is important for the doorknob to operate properly.
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.
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.