How to Remove a Door Lock Cylinder: A Quick Step-by-Step Guide
Published Date: Aug 6, 2025
Whether you’re a homeowner replacing old hardware or a landlord upgrading security, learning how to remove a lock cylinder from a door can be a handy skill. While the process varies based on the lock type, it’s a pretty simple task that doesn't require advanced tools or deep technical knowledge. Below, we break it down by lock style to make it easier. If anything feels too tricky, there’s always the option to bring in a professional.
Is Removing a Lock Cylinder a Tough DIY Job?
It’s not hard, but it’s not for everyone. Removing a lock cylinder can be simple if you have the right tools and follow the steps closely. Still, each lock has its own quirks, and it’s easy to misplace a screw or damage a part if you rush it. If you’re unsure or don’t want to risk damaging the door, Sure Lock & Key is available anytime to handle it from the start. Whether you try it yourself or leave it to the pros, the steps below can help you decide what works best.
How to Remove the Lock Cylinder from a Knob Lock
Knob locks are common on interior doors. Here’s what you’ll need: a flathead or Phillips screwdriver, the key to the lock, and a small paperclip.
- Insert the key and turn it slightly — just enough to unlock the cylinder.
- Find the small release hole near the base of the knob.
- Insert the paperclip into the hole while pulling on the knob.
- Once the knob slides off, unscrew the backplate.
- Gently pull the cylinder out while holding the key steady.
This method helps remove a cylinder cleanly without damaging the knob.
How to Remove the Door Lock Cylinder from a Deadbolt
Deadbolts are more secure, so their design is a bit different. For this, you’ll need a screwdriver and the key to the lock.
- Remove the screws on the interior side of the lock (usually behind the thumb turn).
- Pull off both the interior and exterior plates.
- Insert the key and turn it slightly.
- Locate the retaining clip or mounting screws holding the cylinder in place.
- Gently slide the cylinder out of the housing.
Deadbolts can be a little tighter than knob locks, so take your time to avoid bending any parts.
How to Take Out the Lock Cylinder from a Mortise Lock
Mortise locks are often found in older homes or commercial properties. You’ll need a flathead screwdriver, an Allen wrench, and possibly a cylinder removal tool.
- Remove the faceplate to reveal the mortise housing.
- Use an Allen wrench or screwdriver to loosen the set screw on the side.
- Insert the key, turn it slightly, and gently unscrew the cylinder.
- If it sticks, use the cylinder removal tool to ease it out.
These locks are more complex, but once you remove the cylinder, you’ve already tackled the hardest part of the process.
Now that you know how to remove a lock cylinder from a door, depending on your lock type, you might be ready to take the next step. Here’s a clear guide on how to change the door lock cylinder if you’re replacing it entirely.
When DIY Doesn’t Go as Planned: Reach Out to a Trusted Locksmith
If any step feels confusing or you’re dealing with a jammed lock, it’s okay to call a professional. Forcing parts can damage your door or hardware. Sure Lock & Key handles jobs like these every day, from simple removal to full repair, replacement, and installation. Our technicians are trained to work with all lock types and can solve problems fast without causing extra damage. Contact us and receive professional support whenever you need it.