How to Install a Deadbolt

Rather than replace the old locksets, we suggest you install a deadbolt cylinder lock above the old unit. The two locks may cause you to spend a little extra time getting in, but that gives you extra protection. Here are the installation steps:

1. Be sure the new lock has a paper template to let you drill the necessary holes. Tape the template on the door as shown. One hole goes in the side of the door and is for the cylinder. The other goes into the edge and is for the bolt. They must be lined up properly for the new lock to work.

2. The best tool for the cylinder hole is a power drill and hole saw. Then use a spade bit for the hole that will house the bolt. The template will tell you what bit size is needed for each hole.

3. Drill the cylinder hole first. When the point of the hole saw comes through on the other side of the door, stop and move to the other side to finish the hole.

deadbolt installation How to Install a Deadbolt

4. When you drill the hole for the bolt, continue until you have reached the cavity of the cylinder hole.

5. Insert the bolt in the hole and mark the spot for the plate.

6. Use a chisel to mortise out for the plate. Use the plate to mark spots for drilling pilot holes for the screws that hold the plate.

7. With bolt secured in place by the plate, insert the exterior part of the cylinder so that the connecting arm fits into the bolt unit.

8. Attach the inside part and secure it with the bolts.

9. All that’s left to do is to mark the site for the strike plate on the door jamb, drill the required size hole, and mortise.

The other way to handle this is to replace the entire old unit with a new deadbolt type. Try to find one that will fit into the old holes. If this isn’t possible, you can enlarge the old holes and maybe get a decorative plate to help cover exposed areas.

Learn more about: Door Locks


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