Then mark centerlines on the plywood block.
Old door enlarge existing door handle hole.
The plywood will hold the pilot bit on track until the saw starts cutting.
Turn the door over remove the plywood disk from the hole saw and use the hole saw to drill through the other side of the door until the two holes meet.
Measure the size of the existing hole in your door using a tape measure.
When enlarging a lockset hole mark the centerlines of the old hole on the door.
To overcome this problem fasten a piece of 1 2 inch plywood over the existing hole.
Clamp a piece of plywood to each side of the door lining up the center lines with the center line on the door edge.
Then bore into the plywood and through the hole behind it.
Use a hole saw to drill through the plywood and halfway through the door.
Mar 25 2016 explore bruce wiseman s board home.
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Mark the center of the existing hole on the edge of the door.
2 draw a circle on a sheet of plywood measuring the same size as the hole in your door using a compass to make the circle.
This old house general contractor tom silva installs an undetectable wood patch in an old door.