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How to Replace Door Locks The first protection is your door lock. It will stop unauthorized entry into your home. The locks may need to be replaced due to wear and tear or other circumstances such as moving into a new home or a burglary. To begin, you must determine the size of your cylinder by measuring the distance between the adjustment screw and the center of the knob lock cylinder. This measurement will help you purchase the right-sized lock. Deadbolt If you're looking to ensure that your door is safe from criminals, it's a great idea to install a deadbolt. The bolt extends into the strike plate that is on the door frame when it's locked, making it more difficult for a burglar to gain entry through the door. A single-cylinder deadbolt can be activated using a key on the exterior, and a thumb-turn piece located on the interior. A deadbolt will only work when it's properly installed, though. The first step is to find out if the door has a hole for deadbolts, or if it needs to be bored out. Using the template that comes with your lock installation kit, mark the location of the hole for the deadbolt on the door's surface. Use your tape measure to determine the height of the deadbolt. Mark this measurement on the door's edge. Use speedsquares to draw a straightline across the mark that you made to mark the bolt hole. Then by using a power drill, bore through the hole until it reaches the opposite side of the door. It could take a few minutes. Then, sand the hole and the edge of the door so that it is smooth. It's also an excellent idea to paint or stain the door at this point. Once the door is ready take off any screws that are visible on the deadbolt. This will reveal the rear and front assembly of the deadbolt and its bolt inside. Then unscrew the old bolt and replace it by the new bolt to match your door hardware. You'll need to remove the bolt from the setplate. Then, you'll need to chisel the surface of the door frame to accommodate the strike plate. If your strike plate isn't aligned properly, it's likely because the previous installer didn't correctly mortise it or a weatherstripping was installed and changed the strike position. To correct this issue you'll need to remortise the strike plate as well as the deadbolt. Close and lock the deadbolt after you've completed this process. Test the deadbolt by closing it and locking it once the bolt has been extended into the strike plate. Knob It can make your business and home less secure if the door knob is damaged. It could also make opening and closing the door more difficult, so it is recommended to replace it. Replacing a knob is a relatively simple DIY project that shouldn't take longer than 30 minutes to complete. You can use a screwdriver as well as pliers to get rid of the knob or handle that was previously used Be careful not to damage any other parts on the door. Spray WD-40, or a different dry lubricant, on the mechanism of your door knob prior to you begin. This will let the lock to move smoothly as you turn it. It is essential to choose a quality knob and handle that matches your current doors to ensure proper operation. If you don't already have a matching doorknob then you'll have to purchase a new one. Before you begin the replacement process, examine the old knob to determine which screws are that are holding it in place. If there aren't any screws then you can use the screwdriver to insert the cover plate into the screws plate that is hidden. Once you've removed the knob, check it for indications of damage or rust. You'll need to clean it up if there are any marks or dents however, you shouldn't need to do anything major if the knob is in good shape. Install the new knob. First, examine the new knobs to ensure that you're choosing the right one for your door. You'll need to select one with an extended rod that locks with the rod mechanism of the other knob. Once you've positioned the new knob in the door's hole and then carefully insert it into the latch. Thread the latch plate screws down, then test the spring by pressing down on it repeatedly. The latch should rise each time. Install the second knob and secure it to the rod mechanism of the first knob. Thread the long screws from the interior doorknob through the cylinder holes on the exterior knob and fix it in place. Latch A latch is a metal piece that extends out into the doorjamb in order to hold it closed. The latch can be operated by a knob or handle on the interior of the door, or by a thumb-turn on the exterior. A deadbolt is a device used to secure a latch and prevent burglars from piercing the glass of the door. It also protects against the accidental or deliberate closing of the door by children or pets. You can choose to install an entry point with either a single-cylinder or double-cylinder deadbolt based on the level you prefer for security. Installing a latch involves the same steps like installing a deadbolt however there are some variations. To ensure that the new lock is compatible first, measure the setback on the doorjamb with a tape measure. The setback is measured from the edge of the doorjamb up to the center of hole for the latch plate. The standard setback is 2 3/8 to 2 ¾ inches. If your setback is greater than that, you might need to purchase a latch that is longer from a locksmith or hardware 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 latch mortise, making sure it's deep enough to allow the faceplate of the new latch to sit close to the doorjamb. Tape the strike plate in place to make sure it is positioned correctly. If the strike is set too high, the door could be kicked in or pressure put on it using a crowbar or tire iron. This can also crack the doorjamb. To remedy this issue, the strike can be lowered by drilling another hole in the doorjamb and chiseling out the core of the previous hole. The last step is to mount the new strike plate, which can be accomplished by screwing it over the existing screw holes. Then, use wood putty to cover the screw holes that were previously used and the bolt hole that is not used. After door locks replacement has dried, sand it to a smooth finish. Strike An electric strike is the metallic part where the latch and deadbolt engage when the door is closed. It is a crucial component of the overall security of a lock because it helps keep the door shut and offers additional resistance to force or kicking applied to the door. If a door comes with an electronic strike, it can be opened by using a key and the control unit that controls its electrical impulses. In the past, putting in an electronic strike was as simple as cutting a portion of a doorjamb to remove the latchbolt on a cylindrical lock from the pocket inside the strike. This modification is not just ugly and unattractive, but also exposes the mechanism for the latchbolt and keeper to uninitiated users. Recently, a number of electric strike manufacturers have come up with a “No Cut” kind of strike that doesn't require a cutout in order to operate. These strikes have a unique design to allow the keeper and latchbolt to slide into the strike pocket without marring the doorjamb faceplate. The strike is equipped with an internal ramp that raises the latchbolt and keeper whenever it receives a signal from an individual reader. The keeper and latchbolt are lifted higher up the ramp by the retract. When the door is shut, the deadbolt remains in place and the latchbolt is retracted into the keeper. Installing an electric strike is a simple process, especially when you are replacing a strike on an existing door. If you're upgrading an access control system to an electric strike, it is important to ensure that the new system is compatible. It is also necessary to make sure that the strike is wired to your access control system and that it is set up for fail-safe operation. One way to safeguard against unauthorized access is to upgrade the strike on your doors to a high-quality strike plate. These plates can be fitted with up to six screws of three inches instead of the standard two screws of three-fourths inch. These longer screws make it harder for people to break the frame and reach inside to turn the thumb turn part of a single deadbolt cylinder.