Cylinder hole but some of them have inserts to fit the smaller 1 1 2 in.
How to enlarge hole in door for lock.
To enlarge an existing hole.
The plywood will hold the pilot bit on track until the saw starts cutting.
This is a common problem when drilling a larger hole in a door for a new deadbolt or lockset.
Then bore into the plywood and through the hole behind it.
The backset distance is usually either 2 3 8 or 2 3 4 in so make sure the new deadbolt has the identical backset.
Then mark centerlines on the plywood block.
This technique can be used to enlarge other holes as well including faucet holes on a kitchen countertop.
Hi rasher i bought some new door hardware to retrofit into an existing mortise lock door.
Watch this video to find out more.
How to enlarge the door knob hole in a wood door.
The lock itself is a bit larger than the old lock so i need to enlarge the mortise in the door.
Lay the block on the door and align the two sets of center marks.
Your front door is the first thing visitors see so choosing the right door is critical to making a great first impression.
Most new deadbolts require a 2 1 8 in.
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.