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How to Replace Door Locks Door locks are your primary line of defense against unauthorized access to your home. Signs of wear and tear and also instances like moving into a new home or burglaries, may trigger the necessity of replacing your lock. 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 help you select the appropriate lock. Deadbolt If you want to make sure your door is safe from criminals, it's a great idea to install a deadbolt. When the bolt is extended into the strike plate of the doorframe, it makes it harder for an intruder to get through the door. A single cylinder deadbolt can be activated with a key on the exterior side and a thumb turn part on the interior. Deadbolts can only function only if it is correctly installed. It is first necessary to determine whether the door already has a hole that is suitable for a deadbolt, or if you need to bore it out. With the template included with the lock installation kit, mark the location of the deadbolt hole on the door's surface. Then, use the tape measure to determine how high the deadbolt needs to be. Mark this measurement on the door's edge. Use a speedsquare to draw a straightline across the mark that you made to mark the bolt hole. Then, using an electric drill, bore out the hole until it reaches the opposite side of the door. This may take a while. Sand the hole and the edge of the door to make it smooth. At this point, it's a good idea to paint or stain your door. When the door is open remove any screws visible on the deadbolt. This will reveal the back and front assemblies of the deadbolt, and also the internal bolt. Then unscrew the old bolt and replace it by the new bolt to match your door hardware. It is necessary to remove the bolt from a setplate. Once this is done then you need to cut out the space for the strike plate on the door frame. If see is not in alignment It could be due to the previous installer didn't mortise it properly or that an installation of a weatherstripping altered the strike position. To fix this issue, you will need to remortise the strike plate and the deadbolt. Close and lock the deadbolt after you've completed this step. Test the deadbolt by closing it and locking it once the bolt has been extended into the strike plate. Knob If a door knob wears out it could make your business or home less secure. It can also make opening or closing the door more difficult, so it is an ideal idea to replace it. Replacing the knob is an simple DIY project that shouldn't take less than 30 minutes to complete. Use pliers or a screwdriver to remove any old knobs or handles. Be careful not to damage the other components of the door. Spray WD-40, or another dry lubricant on the mechanism of your door knob before you begin. This will help the new lock slide smoothly as you turn it. It's essential to select the best knob and handle that match the doors you currently have to ensure proper operation. If you don't have a doorknob that matches and handle, you'll need to buy a replacement. To begin the replacement process, first look at the knob or handle to determine the screws that hold it in place. If there are no screws then you can use the screwdriver to insert the cover plate between the screws plate hidden behind it. After you've removed your old knob, examine it for signs of damage or rust. If the knob has any scratches or marks it's time clean it. Otherwise it shouldn't need any major work. Install the new knob. Begin by examining the new knobs to ensure you're picking out the right one for your door. You'll need to pick one with an extending rod that will interlock with the rod mechanism of the other knob. After you've placed the new knob over the door's hole, carefully slide it into the latch. Test the spring by pressing it down repeatedly. The latch should spring back up every time. Install the second knob and lock it to the rod mechanism of the first knob. Attach the other long screws from the interior knob through the cylinder hole on the doorknob on the outside and secure it. Latch A latch is a piece of metal that extends into the doorjamb to secure it shut. The latch is operated via a knob or handle located inside the door, or a thumb-turn on the exterior. A latch can be secured with deadbolts to prevent intruders from breaking in through the door's glass. It also protects against accidental or intentional closing of the door by children or pets. A latch can be installed with single cylinder deadbolts or double cylinder deadbolts, based on the level of security you prefer. Installing a deadbolt is the same as installing a latch but there are some differences. First, determine the setback of the doorjamb using a tape measure to make sure that the new lock will fit. The setback is the distance between the edge of the doorjamb to the center of the hole that will be used for the latch faceplate. The standard setback is 2 3/8 to 2 3/4 inches. If you have a higher setback, you might need to purchase a larger latch at a hardware store or locksmith. Next, make a hole for the latch plate in the doorjamb's edge. Use a chisel to chisel out the mortise for the latch making sure it's large enough to allow the faceplate of the new latch to sit flush with the doorjamb. Tape the strikeplate to the doorjamb to ensure it is positioned properly. If the strike is too high, you could kick the door in or apply pressure with the tire iron or crowbar. This can cause the doorjamb to crack. This can be fixed by drilling a new hole in the doorjamb, and cutting the core from the hole that was previously made. Installing the new strike plate is the final step. This can be accomplished by screwing the new plate into the screw holes that are already in place. Then, use wood putty to cover the old screw holes and the bolt hole that will not be used. After the putty is dry you can sand it until it has a smooth finish. Strike An electric strike is the metal piece that holds the deadbolt and latch are engaged when the door is shut. It is an important part of the security of a lock, as it helps keep the door shut and provides extra resistance to kicking or force applied to the door. If a door is equipped with an electric strike, it can only be opened with keys or the control unit that controls the electrical impulses. In the past, putting in an electronic strike required cutting a portion of a doorjamb, which would let the latchbolt of a cylindrical lock from the pocket inside the strike. This modification can be an issue when it comes to the aesthetics of an opening, and it also exposes the latchbolt and keeper mechanism to unintentional 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. 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 an indication from an individual reader. The retraction of the keeper and latchbolt raises them on the ramp, locking the door. When the door is closed the deadbolt remains retracted, and the latchbolt retracts into the keeper. Installing an electronic strike is a simple procedure, particularly in the case of replacing an existing strike. If you are upgrading an access control system to an electric strike, you need to make sure that the new system is compatible. You will also have to make sure that the strike is properly connected to your access-control system and set up to function in a safe manner. One way to safeguard against access by unauthorized persons is to upgrade the strike on your doors to a high-quality strike plate. These plates use four to six screws of three inches instead of the two three-fourth inch screws typically used in regular strikes. These screws are longer and make breaking the frame to reach the thumb turn piece on a single cylinder deadbolt more difficult.
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