Choose the mark that corresponds to the door width.
Size of door handle hole.
Bore a 2 1 8 inch hole through the door.
In most cases the door set which is inside of the door and controls the door latch.
Hole saws come with a centered pilot bit that allows you to center the hole saw.
Measure from the center of the door knob hole to the edge of the doorway to find the size of the door set.
The placement of the cross bore hole is important for the doorknob to operate properly.
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.
Fit into the door prep shown above.
To know where to drill this hole from the edge of the door you need to know the backset of the lockset.
There are a few exceptions and we ll discuss those here in a bit but there are no.
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.
Without this pilot bit the hole saw would wander across the face of the door as you start to drill the giant hole.
Use a jig or template to get it straight.
The center of this hole should be located 2 3 8 inches or 2 3 4 inches back from the edge of the door.
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 latch will fit into the 1 inch hole.
The larger 2 and 1 8 inch hole is drilled first.