Hole saws come with a centered pilot bit that allows you to center the hole saw.
Size of door handle hole.
To know where to drill this hole from the edge of the door you need to know the backset of the lockset.
In most cases the door set which is inside of the door and controls the door latch.
Fit into the door prep shown above.
Measure from the center of the door knob hole to the edge of the doorway to find the size of the door set.
There are a few exceptions and we ll discuss those here in a bit but there are no.
Use a jig or template to get it straight.
The larger 2 and 1 8 inch hole is drilled first.
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 center of this hole should be located 2 3 8 inches or 2 3 4 inches back from the edge of the door.
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.
Bore a 2 1 8 inch hole through 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.
Choose the mark that corresponds to the door width.
The latch will fit into the 1 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.
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.