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How to Fit a Door Lock

This article is a collaborative effort, crafted and edited by a team of dedicated professionals.

Contributors: Muhammad Baballe Ahmad, Mehmet Cavas, Sudhir Chitnis, and Zhen-ya Liu.

✓ Verified & Tested Information

Wondering how to fit a door lock? Follow these easy steps and you’ll have it done in no time!


Installing a door lock is not an overly complicated task, however, it does require some planning and preparation. Before starting, make sure that you have all the tools and materials necessary to complete the job. You will need a door lock, screws, jigsaw, screwsdriver and a drill. Ensure you have all these materials on hand prior to beginning work. In addition, it is important to measure the door to check the correct size of the door lock should fit.

Gather the necessary tools and supplies

Before beginning the process of fitting a door lock, it is important to first gather the necessary tools and supplies. To successfully complete this project, you will need a drill with a selection of drill bits, as well as adjustable screwdriver; a chisel; sandpaper; sealant; grease; and a set square or similar tool for measuring accurately. In addition to these items, you may also need glue and screws depending on the type and style of door lock you have purchased. To ensure that your lock is properly fitted, it is important to take some time in advance to assess what tools and materials you will require before commencing with the task.

Measure the door

It is essential to accurately measure the door before attempting to fit a lock. This involves measuring both the width and thickness of the door. The style of lock you choose will be based on its installation depth, which is determined by taking into account both measurements so make sure you record the results clearly. Measure from the edge of the door inwards, being careful not to include any perimeter moulding as part of your measurement. Measure twice over to be sure that you have obtained accurate results before continuing with your project.

Determine the type of lock you need

Once you have decided which door to fit a lock to and the type of door handles you want, the first step is to determine what type of lock you need for your particular situation. Door locks come in many different types and styles, so it’s important to ensure that you select one that fits your specific requirements.

The most commonly used types of locks are deadlocks, nightlatches, sashlocks and mortise locks. Each of these locks has their own advantages and disadvantages – it is important to consider carefully in order to make the right choice.

Deadlocks: Deadlocks use keys which operate traditional spring mechanisms and are mainly used as auxiliary locks. Deadlocks are often used on front doors or back doors but not recommended as the only door locking system as they can be easily defeated by experienced burglars.

Nightlatches: Nightlatches use an automatic deadlocking system with a latch that allows immediate release from inside without using a key. They are more secure than deadbolts alone because they can not be unlocked from outside without a key and it is not possible for intruders to slide open locked doors from outside by lifting handles or turning snibs (small security control levers).

Sashlocks: Sashlocks use a strong, concealed bolt with a thumbturn for easy opening inside, but require a key from outside in order to unlock them. They offer significant protection from intrusion since they provide greater resistance against levering with tools such as chisels or crowbars than other types of latch doorm3s.

Mortise Locks: Mortise locks offer advanced levels of security and internal rooms where additional privacy or security is desired; these may include bedrooms or bathrooms. They involve an internal locking mechanism that requires both movement of the handle followed by insertionf oey detore causing bolt work withinhe owrk frame which active both sides and top/bottom bolts simultaneouslyMesurobestapexgnizvleea trls gthdierespig piaster tdeiolaloltiikcclu aby ffufylesitltepallylfee ndducugwghhctr umebllrr.

Remove the Old Lock

Before replacing the door lock, you must first remove the existing one. This is an important step in the process, as it will allow you to fit the new lock securely. Start by removing the screws from the inside of the door. Then, take out the lock from the door and unscrew the faceplate from the door frame. Once the faceplate is removed, you should be able to access the mechanism of the lock inside the door.

Unscrew the existing lock

Once the new lock is ready, you can now start removing the old lock. Begin by unscrewing the screws holding the old lock in place. Depending on your door, there might be screws from inside or from outside of it. It is important that you loosen each of these screws fully before moving on to the next step. Once all the screws have been removed, carefully take out the entire lock assembly and set it aside while you prepare to fit your new one.

Remove the lock from the door

Removing the old lock from the door can be a complicated process, but it’s important that you take your time and do it correctly to avoid any damage to your door or the new lock being fitted. Firstly, remove any visible screws from the inside side of the door (or from both sides of a double-door). This should allow you to separate the interior plate from the outside plate a little. If not, try inserting a thin flat head screwdriver into their edges and gently flex them apart. Once this is done, you should be able to take off one or both of the plates through which you can access the locking mechanism effectively.

Once exposed you should be able to remove some more screws or bolts behind your locking cylinder and catch that holds everything together. You may need some wire cutters or snips in order to do this. After unscrewing these parts, carefully remove any metal bars holding down each part before removing them completely. It’s now possible to identify which existing lock is installed on your door – either a deadbolt or double cylinder that requires two keys on both sides. Depending on your preference, it’s now simple enough for you to replace and fit whatever new lockset you desire!

Install the New Lock

Installing a door lock can be a relatively easy task with the right tools and preparation. Before you start, you’ll need to gather the right materials, including a drill, a Phillips-head screwdriver, a hammer, and a door lock of your choosing. You’ll also want to ensure that the door lock is the right size for your door. Now, let’s get into the steps for installing your new lock.

Install the new lock in the door

Once you have chosen the kind of lock you want to install, the next step is to actually fit it into the door. To do this, you will need the following tools: a drill, a jigsaw, wood chisels, and other cutting tools. Depending on the type of lock that you chose and what type of door material your door is made from, will determine which tools are necessary for installation.

To begin installing the new lock in your door, first check to make sure all measurements are correct before cutting into any material using your drill or jigsaw. Next, cut out a rectangular hole (depending on what size of lock is being installed) and take precautions to prevent damaging any surrounding parts of the door while doing so. Depending on what type of lock is being installed will determine how much extra space needs to be cut out for extra components such as strike plates or latching mechanisms.

When everything has been fitted correctly then test both sides of the lock with a key or code if using an electronic system – making sure each side functions correctly as expected prior to installation completion. Once all components have been tested for functionality then adjust accordingly for ease and comfort when unlocking/locking both sides then finally screw everything in place before moving onto additional adjustments and styling options such as decorative handle sets etc Congratulations now enjoy your newly installed locking system!

Secure the lock with screws

Be sure not to overtighten the screws; you don’t want to damage the timber or distort the faceplate of your door lock. The screws provided with most locks should be tightened by hand. Once you have assembled and adjusted the door lock, turn the spindle so that it opens and closes without issue. If it is difficult to move, then gently adjust the following:

-Strike box: This is a metal frame that holds your door catch in place and should line up with where the latch on your door strikes when it closes, then adjust by loosening your screws and tapping gently until flush.
-Latch: Ensure this lines up correctly with your strike box and deadbolt so that it stays closed when not in use and is free to move when operated by a key or knob. Again, adjust slacking/tightening slightly until you are satisfied with its motion.
-Brass plates: These form part of the outer faceplate of your lock and connect both sides together, ensure these are secure but not over tightened as this may cause distortion of surface areas.
-Tu yoke clip – secure inner facets of locks together using this clip to ensure full operation when opening/closing doors. Again be sure not to overtighten screw top on this piece as it can be easily stripped or damaged leading to further issues with operation of lock parts.

Test the new lock

Once you have fitted the new lock to the door, it’s important to make sure that it functions properly. Start by checking if the cylinder fits correctly in place, with no movement or gaps. Next, try locking and unlocking the door with the key and make sure that the latch moves freely when engaged or disengaged. It’s also a good idea to check if the other side of the door can be opened or closed with a key if necessary. Make any necessary adjustments and re-fit any screws before using your newly installed lock.

Finishing Touches

Fitting a door lock is an important part of any home security setup but you may find yourself wondering what the finishing touches are. This article will discuss what you need to do once the lock is installed in order to make sure that it is securely fitted. We will also look at how to maintain the door lock for maximum security.

Paint or stain the new lock

Once the new door lock is fitted, it can be modified and adjusted as needed to operate properly. To finish the job, you can choose to give it a fresh coat of paint or stain depending on what kind of material your door is made from. Paint may be necessary if there are chips in the surface or if the metal is starting to rust.

If you do choose to apply a protective sealant like paint or stain, make sure that it’s a product that’s specifically designed for use on metal doors. Ideally, this product should be applied before installing the door lock so that both sides of the lock are sealed. Also, make sure to read and follow any application instructions for drying time or use special cleaners provided by the manufacturer before using your new door lock.

Replace the door knob

Now that you’ve measured, chosen, and installed your door lock, it’s time to replace the door knob. Before you begin, double-check that your door is firmly closed. To replace the knob:

1. On one side of the door remove the Phillips screws securing the rose plates and pull off both plates.
2. Disengage the latch from the side of the bore using a flat head screwdriver or knife blade and set aside with other removed pieces.
3. Insert new latch into correct position on knobset. (This will vary depending on type of lockset.)
4. Slide mounting plate onto new knob shank behind rosette plate then push rosette plate onto end of shank until it clicks into place.
5. Secure rosette plate to framing with two Phillips screws, then repeat steps 1-5 for opposite side of door to install second interlocking knob or lever set
6 Finally, if necessary test your key in both sides of your lock before replacing trim pieces and enjoying your newly secure entrance!

Check the lock for proper operation

Now that the door lock is fitted snugly into the door, you will want to take a few moments to make sure that it is properly and securely fitted. Start by checking if the latch opens and closes and see if it engages correctly in both places when turned. Make sure to use your key in this step and test the operation of all functions of your new door lock, such as any security mechanisms or additionality buttons.

If everything works correctly, now is a great time to make the final adjustments that will ensure you get many years of reliable service from your new lock. Ensure that the latch bolt is properly aligned with its strike plate so that it fits tight without being too tight on either side. The flush with which this alignment is achieved should be consistent throughout, as an incorrect alignment could cause damage or improper functioning to take place in the future. Lastly, verify that the screw heads are all flush with their respective countersunk holes for a finished aesthetic look for an enhanced overall appearance.

How to Fit a Door LockCheckout this video:

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