Knowing how to change a door lock cylinder can save you time and money, but many homeowners struggle with faulty locks. Over time, door lock cylinders can get stuck, turn poorly, or fail to lock properly, leaving your home less secure. Even with a 17.8% drop in burglary incidents in the U.S. during the first quarter of 2024 compared to 2023, home security remains a priority.
Dealing with a malfunctioning lock is frustrating, especially when the solution seems to be paying for an expensive locksmith. Waiting for a professional only increases the feeling of vulnerability and inconvenience.
Replacing the lock cylinder is an easy DIY fix. With just a few basic tools, you can replace the old cylinder yourself and restore your home’s security without the need for a locksmith.
Tools and Materials Needed
Changing a door lock cylinder is a simple task when you have the right tools and materials. Below is a list of what you’ll need to get started:
- Screwdrivers (Flathead and Phillips): These are crucial for removing the screws that hold the lock and cylinder in place. A flathead for some screws and a Phillips for others ensures you have all angles covered.
- Allen Wrench: Certain locks, particularly higher-security models, may require an Allen wrench to remove the set screws holding the cylinder.
- Tape Measure: This helps you measure the length of the cylinder and verify that your replacement is the right size for your door.
- Replacement Cylinder: Be sure to choose the correct replacement cylinder that matches your lock’s design, the door’s thickness, and backset.
- Lubricant (Optional): If your old lock cylinder is stuck, a little lubricant can make removal easier, especially if it’s rusted or clogged with dirt.
- Key (for Existing Lock): Keep the current key handy. It can help align the internal mechanism while removing and installing the new cylinder.
How to change a lock cylinder: Step-by-step
With the proper steps, changing a door lock cylinder can be completed quickly and without complications. Let’s dive into the easy Six process you need to follow.
Remove the old lock
Locate and remove the screw on the door’s edge, aligned with the lock cylinder’s bottom, using a suitable screwdriver. This screw secures the cylinder in place, so it must be removed first in the process of changing a door lock cylinder.
Before moving forward, take off any decorative escutcheons or covers from both sides of the door. Do this carefully to avoid scratching the door surface and to access the cylinder fully.
Next, insert the key into the working side of the lock. While holding the key, gently push the cylinder from the opposite side. As you wiggle the key, the cam will align, letting the cylinder slide out. Finally, pull the cylinder through the key side.
Safety matters here, since OSHA reports that up to 10% of industrial incidents are linked to failures in lockout procedures, showing the value of careful handling even for DIY tasks.
Unscrew the flat screw under the latch
Use a flathead screwdriver to turn the screw under the door latch counterclockwise and remove it. This action releases the lock cylinder and sets up the next step.
Keep the door propped open while you work to avoid pressure on the lock. Place the removed screw in a safe spot so it does not get lost. If the existing screw shows signs of wear or damage, replace it with a new one from the cylinder kit. This step keeps the lock firm and prevents future issues.
Turn the key a quarter turn
Ensure the key is turned to enable sliding the lock out, as failure to do so will prevent lock removal. This step retracts the latch inside the lock and prepares it for release.
Next, insert the key into the keyhole and rotate it slightly to the open position. Avoid over-rotating the key beyond the necessary quarter turn, as excessive movement may cause the cam to interfere and complicate the extraction process. With the key set in the correct position, the cylinder can slide out smoothly.
Pull the key while pushing the lock
Pull the key while simultaneously pushing on the opposite side of the lock, keeping the key turned. This movement allows the lock cylinder to loosen and start sliding out.
If the cylinder feels stuck, turn the key slightly more or less until the latch shifts. Once aligned, the interchangeable lock cylinder will release and slide out.
Handle the extracted cylinder carefully to avoid dropping it. A fall could cause internal parts to dislodge, which may require professional repair. Keeping a steady grip protects the cylinder and makes reinstallation easier.
Slide the new cylinder into the hole
Slide the new cylinder into the hole while the latch is retracted. Before insertion, ensure the cam on the new cylinder is fully retracted by inserting the key and turning it slightly. This prevents the cam from sticking out and blocking the fit.
Next, turn the key counterclockwise a quarter turn to pull the latch back into the cylinder. With the latch retracted, guide the cylinder smoothly into the hole. This helps it sit firmly and stay aligned for the following steps.
Reattach the flat screw
Thread the flat screw into the hole using your fingers. This helps guide it into place smoothly and reduces the chance of slipping.
Next, use a flathead screwdriver to tighten it until it sits flush with the door’s side. A secure screw keeps the lock cylinder stable and harder to tamper with.
According to ADT, most burglaries happen between 10 a.m. and 3 p.m., with 34% through the front door and 22% through the back door. Keeping the screw tight lowers the chance of weak points that intruders can use.
After tightening, reinstall decorative escutcheons on both sides of the door. They improve the look of the door and add another layer of protection against tampering.
Closing on a New House? Don’t Forget to Change Out the Locks
Changing a door lock cylinder not only helps maintain your home’s security, but it’s also essential when moving into a new home. Many homeowners overlook this step, leaving previous owners or others with access to their property.
For a safer, more secure living space, it’s wise to replace all the locks as soon as you move in. To learn why this is so important, check out our guide on what to do when closing on a new house and why changing the locks should be at the top of your list.
Need Help with Changing Your Door Lock Cylinder? Call A1 Locksmith Services LLC!
Changing a door lock cylinder can be a quick and easy DIY task, but it’s always a good idea to leave security concerns to the professionals. If you’re unsure or need assistance, A1 Locksmith Services LLC is here to help! Our expert locksmiths ensure your home’s security is top-notch with reliable lock installations.
For fast, dependable service, call us today at +1(813)817-5576. Let us help you keep your home safe and secure.
Frequently Asked Questions
How to measure a cylinder without removing it from the door?
Use a ruler or tape measure to check from the center of the keyhole to each edge of the door hardware. This gives you the inside and outside measurements without removing the lock.
How much does it cost to replace a cylinder lock?
On average, replacing a cylinder lock costs between $50 and $200, depending on the lock type and labor fees. Higher-security locks may cost more.
How hard is it to replace an ignition lock cylinder?
It can be tricky because it often requires removing panels and working with the steering column. Many people hire a locksmith or mechanic to avoid mistakes.
