June 29, 2021 2 min read
There are many reasons that you may need to replace the deadbolts in your home. Perhaps you are replacing all of your outdated door hardware, or maybe you simply need to change your exterior locks for security reasons.
In any case, installing a new deadbolt is quite easy, and here are some steps that should help.
Most residential door hardware requires a 2-3/8" backset. The backset is the distance from the edge of the door to the center-point of the hole that you will need to drill. If you are replacing an existing deadbolt and do not need to drill a new hole, confirm that the backset measures 2-3/8". Otherwise, mark a point at a 2-3/8" backset at the desired height from the bottom of the door. Additionally, mark a point at the center-point on the edge of the door, directly even with your backset point.
If necessary, use a hole-saw to drill a 2-1/8" (54mm) diameter hole, centered on a 2-3/8" backset. It is recommended that you drill about 3/4 of the way through the door slab from one side, just until the pilot bit of the hole saw protrudes from the opposite side. Then, finish drilling from the opposite side.
Using a 1" bit, drill a hole from the side of the door slab, finishing when the hole extends into the new hole for the deadbolt.
Install the latch through the 1" diameter hole, and use a pencil to outline the latch plate. Using a sharp chisel (3/4" is recommended), chisel the marked area to a depth of 1/8", or until the latch plate rests flush with the edge of the door slab. Reinsert latch into hole, and secure latch plate with the included screws.
Press deadbolt cylinder flush against the door, making sure that the torque blade (sometimes called a "tongue") is properly positioned through the interior part of the latch. The tapped holes in the mounting plate of the exterior cylinder should be lined-up with the corresponding latch holes. The torque blade should be vertically inserted into the latch mechanism.
Slide the interior rosette and turn-piece so that the torque blade is inserted into the slot on the inside of the rosette. Insert machine screws through the holes, and engage the screws with the holes in the backside of the exterior cylinder. Then, tighten screws evenly, making sure not to over-tighten, or tighten one screw significantly more than the other.
Using a 1" bit, bore a 1" diameter hole a minimum of 1" deep into he door jamb, directly across from where the deadbolt latch will be extended when the door is closed. Center the strike plate over the hole and mark around the outside with a pencil. Using a sharp chisel, chisel the marked area to a depth of 1/8", or until the strike plate rests flush with the edge of the door jamb.