Drilling a deadbolt lock should be your last option because it will destroy the lock.
How to drill a deadbolt door lock.
Use a 7 8 spade bit to drill two overlapping holes in the doorframe for the deadbolt.
Inside every deadbolt lock are a number of tumbler pins that lock and unlock the bolt.
When you open the door the position of the bolt will be evident on the jamb.
In this video i m showing how to drill a brand new kwikse.
Lock drilling is a last resort approach to gaining entry to locks that cannot be opened by other means.
If your new deadbolt has a concealed screw for the interior door knob consult the installation instructions for your specific lock.
If you lose the key and can not pick the deadbolt than you can drill the deadbolt to break the tumbler pins and turn the lock using an object.
Use a 2 1 8 inch hole saw to drill the hole for the deadbolt lock assembly.
If you re in a situation where you cannot or do not want to use a drill to install your lock there are a couple ways of installing an interior door lock without a drill.
Close the door and turn the deadbolt several times to mark the doorframe.
Drilling a lock will destroy the locking plug but should leave the mechanism in working order.
Mortise the area around the hole so the strike plate will fit flush with the doorframe.
Good to know to prevent splintering in a wood door drill halfway through one side and then flip the door and drill through the other side.
Drill pilot holes and secure the striker plate with screws.