How To Install a Deadbolt Lock
Learn How to Install a Dead Bolt Lock
For starters there are a few types of dead-bolt locks but for this article we will be focusing on the most basic, the cylindrical type which can be found at Home Depot or any hardware store but you will be limited to specific brands such as Schlage and Kwikset.
Next we must decide as to how we will install the deadbolt as there are two options.
The lock will come with a paper template, which you is used as a guide to line up against the door, or you can purchase a Lock Boring Jig which attaches to the door and guides you threw the necessary steps almost effortlessly.
Depending on which method we choose will determine what tools we will need to complete the process. If we decide to use the template provided by the lock manufacturer then we will need
- 1 Electric Drill (Cordless or Hardwired)
- 1 Hole Saw 2-1/8 inch Diameter
- 1 Hole Saw 1-1/4 inch Diameter
- 1 Spade Bit 1-1/4 Inch (For Wood Only)
- 1 Phillips Head Screw Driver
- 1 Wood Chisel (For Wood)
- 1 Metal Drill Bit 1-1/4 Inch
- 1 Razor Blade (Optional)
Note: If we use the Lock Boring Jig then all of the above should be included with the set except for the Wood Chisel, Phillips Head Screw Driver, Razor Blade and Spade Bit.
First we need to decide where we would like to place the dead-bolt lock and then take the template and press it against the door using the middle vertical line, as in the image below as a marker that should be applied to the edge of the door.
Once we establish the placement, we need to fold the template inwards as if we wanted to fold the paper in half. Our goal is to position the three lines that we see to the left of the vertical line up against the flat side of the door where the bolt is to be placed. This is what is known as the center of the door edges.
We must make sure that we press and fold so that the template will crease and provide us with an accurate measurement. It is a good idea to use scotch tape as an adhesive to help keep the position of the template.
Standard Doors are 1-3/4 inches thick so for purposes of simplicity we will use this measurement as our guide for this tutorial. If you find that your door is a different measureme
nt then what we have discussed in this exercise then just reapply what you have learned and make the necessary changes for your doors measurements. This can be found on the template as well.
Determine the Backset
What is Back Set? The backset determines how far inside of the door a bolt will sit and it begins from the edge of the door and extends to the center of the hole that you are going to drill. There are two options when choosing the backset! The standard back-sets are 2-3/8 by 2-3/4 inches. With most deadbolt locks you will be giving the option to adjust the backset to your liking but most locks come factory set at a 2-3/8 inch backset, so it is advisable to begin your pre-drilling of the hole at the center of the circle on the template the represents 2-3/8 backset as you will see two options before you start.
Next you must determine the center of the door from edge to edge and again the template will determine this, as you will have two or three options. The goal is to drill a hole in the center of the door edge based on the thickness of the door. You can guess of use a tape measure to determine the thickness, which will usually be 1-3/8 to 1-3/4 inches. There will be lines on the template that mark the center of the door edge and based on thickness you will choose what line you will use to start your pilot hole for installation of the bolt.
Note: The template has markings and measurement numbers for choosing the proper backset. Once you make your assessment of the thickness of the door, you can point and drill on the line that represents the number that shows your door thickness. For example you will see a measurement of 1-3/8 or 1-3/4 so if you measured your door with a tape measure and it measured to be 1-3/4 inches thick, you would go to the marking that reads 1-3/4 and start your pilot hole
Pre Drilling is a method that is used to make the initial hole in your door prior to using the hole-saw. It is used to direct and guide the hole-saw into position and to prevent the hole-saw from becoming displaced. We will use a 1-1/4 inch drill bit to make the pilot hole by inserting the bit into a drill and we will proceed to the area marked on the template that displays a circle that is 2-1/8 inches in diameter. In this circle we will see a horizontal line that cuts right threw the middle of the circle and this area marks the exact center of the hole that we will begin to drill the pilot hole.
Making The Holes For Your Deadbolt Lock
We initially made pilot holes in the door to determine our point of entry and to guide the hole-saw as we drill threw the door. Apply your hole saw to the drill and apply your 1-1/4 drill bit to the 2-1/8 hole saw. Depending on the type of material we are drilling threw, will determine the speed at which we will drill. Wood Doors are drilled at high speeds and metal doors are drilled at low speeds. Take the tip of the drill bit and push it into the pilot hole and begin to drill. Make sure that you are holding the drill straight and continue until the tip of the drill bit protrudes threw the opposite side of the door. Remove the hole-saw and continue to the opposite side of the door. As previous insert the tip of the drill bit into the pilot hole and continue to direct the hole saw threw the door until the drilling of the hole is complete and remove excess wood.
Proceed to the edge of the door and locate the center of the two edges, which should be marked with a pilot hole. Remove your hole-saw and apply the 1-inch to 1-1/4spade-bit. Once secured place the tip of the spade bit into the pilot hole and proceed to drill straight and the hole will become hollow granting a birds eye view of the circular opening that was pre drilled prior with the 2-1/8 hole-saw. This is the opening that was initially drilled for purposes of housing the Dead-Bolt Lock.
How to mortise the strike
Prior to installing the lock I advise that you set the strike and mark the frame. There are numerous ways to set the strike but we will only discuss one that I find to be most effective. I recommend that we take a 1 or 1-1/4 inch hole saw and set it in the hole that we drilled for the bolt using the spade-bit. Next we close the door and making certain that it is properly secure and tight to the frame. Grab the hole saw with your fingers and press against the frame spinning the hole saw left and right to mark and align where the hole will be placed for purposes of housing the bolt. We suggest doing this for a minute or two to be confident that the markings will show up on the frame. Proceed by opening the door and over look the markings on the frame to make sure they are legible and accurate. Unfortunately in most cases we must do this by eye, so use discretion prior to drilling the next hole.
Depending on the type of material that we are working with will determine what type of tool we will use to cut the hole in the frame. Wooden frames will always use a spade-bit and metal frames will use a hole-saw. We will now begin by pre-drilling and creating a pilot hole as we did before to set a guide as to where our hole-saw or spade-bit will go.
Begin to drill the hole until you have enough space for the bolt to rest when in the locked position. On metal frames the hole will be hollow and the metal will be removed as on wooden frames we drill approximately 2-inches deep to be certain that the hole is deep enough to fit the bolt.
When working with wood setting the strike can be tricky, so take your time, as mistakes are irreversible. Take the strike press it against the hole on the frame and screw it in backwards. You should be able to look threw the strike and see the hole that was made. Take your chisel and begin to tap lightly around the strike with a hammer. The strike is meant to be your guide so I suggest letting the chisel rest upon the strike while you tap. After tapping all four corners unscrew the strike from the frame so we can begin to mortise the strike.
Position the strike on a twenty or thirty degree angle and begin to tap lightly upward to remove unwanted wood with the flat side of the chisel facing outward. Always stop and check your progress to make sure there are no mistakes. Do the same for the bottom portion of the frame and continue on both upper and lower portions until it is deep enough for the strike to rest inside flush. This is what locksmith’s term as mortised in the locksmith industry in Brooklyn New York.
The edges surrounding the wooden hole must be chiseled. I find that if I lightly tap and scrape with the chisel I can clean out the surrounding areas with ease. Place your strike in the hole that was just mortised and rest it so it sits flush. Insert two screws to hold it in place and your strike is set and ready to go!
How to Mortise The Bolt
When we mortise the bolt we use the exact same steps that we took to mortise the strike. The only difference is we extract the bolt and we reverse the bolt (just like we did with the strike) and we place it in the hole that we drilled in the door that sits between the two edges known as the center and we begin to screw and chisel just as we did with the strike. When finished take out the screws, place the bolt mechanism in the proper position with the bolt facing outward towards the frame and position the rear end of the strike inside of the hole. Set the screws and you are now ready to install the lock.
Installing The Dead-Bolt Lock
The Dead-Bolt Lock comes in many forms and makes from standard security to high security all work the same and installation is almost identical. We will refer to the basic type of deadbolt, which is the standard type as this is most commonly found in hardware stores.
Dead-Bolt Locks depending on brand will come as two or three piece attachments the get secured with screws going form the back side of the lock threw the bolting mechanism to the screw holes that are on both sides of the cylinder. The cylinder makes up the front end of the lock and the thumb turn makes up the back end. The front end may come as one piece or two separate pieces depending on the quality of the lock and installation is identical but you must make a few adjustments when holding the lock. Lets assume that the lock is of quality and contains only one piece for the front end or exterior door side and a thumb turn for the interior side of the door. The front end will have a tail piece that extends approximately 2-inches from the lock and is adjustable by cutting of pre-marked portions or the tail piece but I have yet to find my self in a position where this need to be done.
Slide the tailpiece threw a small rectangular opening that can be found on the left or right side of the bolts back end. This should slide threw smooth and there should be no resistance. When done press front end of lock firmly against door and hold into position. The dead Bolt Lock comes supplied with two heavy-duty screws that are meant to secure the back and front end of the lock. Place the thumb turn the interior portion of the lock into place by placing it against the door with the tailpiece that is sliding threw the bolt into a small rectangular piece on the interior side of the lock. When this is in place we can now begin to screw in our first setscrew and secure the lock.
Locks tend to have play before they are secured and can be adjusted by eye so everything g can fit into place. Holding both Interior and exterior sides of the lock place a screw threw the predrilled holes and slide them into place threw the bolt until you make contact with the screw holes on the front end of the lock. Once contact is made begin to turn clockwise to tighten the screw to hole the lock in place and repeat for the second screw upon completion of the first.
You have just completed the fresh installation of the deadbolt lock and assuming that you followed my guide you should achieve success with your lock installation