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How to Replace Door Locks The first protection is your door lock. It can stop unauthorised access into your home. Locks might require replacement due to signs of wear and tear, or other situations such as moving into a new home or a burglary. You can determine the size of your cylinder by measuring the distance from the center of the knoblock cylinder to the adjustment screw. This measurement will enable you to buy the right lock. Deadbolt Installing a deadbolt is excellent way to protect your door against intruders. When the bolt is extended into the strike plate of the doorframe, it makes it harder for an intruder to break through the door. A single cylinder deadbolt can be activated using an exterior key on the side and a thumb turn device on the inside. Deadbolts can only function if it is installed correctly. First, you'll need to determine if the door already has a hole to install deadbolts or requires drilling. Using the template that comes with your lock installation kit, mark the location of the deadbolt hole on the door's surface. Utilize your tape measure to determine the height of the deadbolt. Then, mark the height on the side of the door. Use the speed square to draw a straight line across the mark you made for the bolt hole. Then, use a power drill to drill this spot until the hole reaches the other side of the door. It could take a few minutes. Then, sand the hole and along the edge of the door so that it's smooth. It's also a good idea to stain or paint the door at this point. When the door is in place take off any screws visible on the existing deadbolt. This will reveal both the front and rear assembly of the deadbolt and its internal bolt. Then, loosen the bolt and replace it with a brand new bolt that matches the door hardware. It is necessary to remove the bolt from a setplate. Once this is done then you need to chisel out the area for the strike plate on the door frame. If your strike plate is out of alignment It could be due to the previous installer failed to mortise it correctly or a weatherstripping changed the strike's location. To fix this issue it is necessary to remortise the strike plate and the deadbolt. After this is done check the deadbolt by closing and locking it. Make sure the bolt is extending into the strike plate, and then test the key to ensure it opens and closes effortlessly. Knob If the knob on your door is worn out it could make your business or home less secure. It may make it more difficult to open or close the door, so it's a good idea to replace it. Replacing a knob is a relatively easy DIY task that should not take more than 30 minutes to complete. Use a screwdriver or pliers to take off any knobs or handles. Be careful not to damage other parts of the door. Spray WD-40 or another dry lubricant, onto the mechanism of your door knob prior to you begin. This will let the new lock to slide smoothly as you turn it. To ensure proper operation it is important to select the knob and handle that are compatible with your doors. If you don't have a match then you'll have to purchase an additional doorknob and latch plate. Before you begin replacing the knob, look over the knob you replaced to determine which screws are keeping it in place. If there aren't any screws you can use a screwdriver to wedge between the cover plate and the hidden screws plate and remove it. After you have removed the knob take it apart and look for indications of damage and rust. If the knob has any scratches or marks then you'll need clean it. Otherwise it shouldn't need any major work. Now it's time to install the new knob. Before you do that, look over the two new knobs to ensure you're picking out the right one for your door. You'll need to choose one with an extending rod that's designed to lock into the second knob's rod mechanism. Once you've positioned the new knob in the door's hole and then carefully place it in the latch. Thread the latch plate screws down, then test the spring by pushing down several times. The latch should spring back up every time. Install the second knob, and lock it to the rod mechanism of the first knob. Thread the long screws from the interior doorknob into the holes for the cylinder on the outside knob and fix it in place. Latch A latch is a piece metal that extends into the doorjamb to hold it closed. It is operated by a knob or handle on the inside of the door, or a thumb turn on the exterior side of the door. A latch can be secured using deadbolts to prevent intrusions from piercing the glass of the door. It also protects against accidental or intentional closing of the door by pets or children. The latch can be fitted using single cylinder deadbolts or a double cylinder deadbolt, depending on the security level you prefer. Installing a deadbolt can be the same as installing a latch however, there are some distinctions. First, determine the setback of the doorjamb with a tape measure to be sure the new lock will fit. The setback is the distance from the edge of the doorjamb to the center of the hole for the latch faceplate. The standard setback is 2 3/8 to 2. ¾ inches. If your setback is higher than that, you might need to purchase a latch that is larger from a hardware or locksmith store. The next step is to drill an edge bore hole into the doorjamb to accommodate the latch plate. Use a chisel to chisel out the mortise of the latch, making sure it's deep enough for the faceplate of the new latch to sit flush with the doorjamb. Put the strike plate into place to make sure it is positioned correctly. If the strike is set too high, the door could be pushed in or pressure put on it using a crowbar, or tire iron. This can cause cracks to the doorjamb. This can be fixed by drilling a new hole in the doorjamb, then chiseling the core out of the hole that was previously made. Installing the new strike plate is the final step. This can be accomplished by screwing the new plate over the existing screwholes. Use wood putty then to fill in any old holes for screws or bolts that aren't being used. After the putty has dried, sand it to a smooth finish. Strike An electric strike is the metallic piece where the deadbolt and latch are engaged when the door is closed. It is a crucial component of the overall security of a lock since it seals the door and provides extra resistance to force or kicks applied to the door. If a door comes with an electronic strike, it will be opened only with an entry key and a control unit that controls its electrical impulses. In the past, installing an electronic strike required cutting a portion of a doorjamb, which would release the latchbolt of a cylindrical lock from the pocket that is inside the strike. This modification is not just undesirable, but also exposes the mechanism of the latchbolt and keeper to uninitiated users. Recently, several electric strikes manufacturers have created a “No Cut” kind of strike that does not require a cutout to operate. The strikes have a unique design that allows the latchbolt and keeper to slide into the pocket without causing damage to the faceplate of the doorjamb. The strike has an internal ramp that lifts the latchbolt and keeper when it receives the signal of a reader. knowing it and latchbolt are pushed up the ramp due to retraction. When the door is shut the deadbolt remains in retracted and the latchbolt retracts into the keeper. Installing an electric strike is an easy task, especially in the case of replacing a strike on an existing door. If you're planning to upgrade an existing access control system to an electric strike, you must ensure that your new system is compatible. You will also have to make sure that the strike is properly connected to your access control system and is configured to operate in a fail-safe way. Upgrade your strike plates with heavy duty strike plates to stop unauthorized entry. These plates can be fitted with up to six screws of three inches instead of the usual two screws of three-fourths inches. These longer screws make it difficult for anyone to break the frame and then reach inside to turn the piece that turns the thumb of a single deadbolt cylinder.