Set the backset measurement to either 2 3 8 or 2 depending on the style of the door and personal preference.
Bore door handle.
Use a drill driver with the 2 1 8 hole saw to bore a hole through the door.
Once the center bit is through the door stop.
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.
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.
The diameter of the latch bore is generally 1 to accommodate bolts from either mechanical or electronic locksets.
Most standard interior doors are 1 3 8 inches thick and the door is slightly beveled to make the closure into the jamb.
Place the hole saw jig on the door.
What if you have a triple bore hole door.
The latch bore also known as the edge bore is the hole drilled from the side of the door into the cross bore to allow the latch of the lock to be installed and to accommodate the sliding of the deadbolt.
That means you need a deadbolt for the top hole and a front entry handle for the two holes below it.
Buy the correct door hardware for the application so the door handles for passage or privacy have the correct back set and bore.
Like the other door setups your deadbolt can be mechanical electronic or smart.
Standard door preparation for a door with both a door knob and a deadbolt have two sets of bore holes and cross bores stacked on top of each other at 5 1 2 from center to center like the diagram shown on the left it should have the exact preparation for the deadbolt as the knob below with a 2 1 8 diameter bore hole and 1 cross bore.