+86-0752-3699716

What is the process of re - keying a lock cylinder?

Aug 22, 2025

Alex Chan
Alex Chan
Alex is the Head of Supply Chain Management at Shenzhen Minghou Technology Co., Ltd. He oversees the global supply chain operations, ensuring efficient production and timely delivery of high-quality hardware solutions.

Hey there! As a lock cylinder supplier, I often get asked about the process of re - keying a lock cylinder. It's a pretty common need, whether you've lost your keys, moved into a new place, or just want to enhance security. So, let's dive right into it.

Understanding the Basics of a Lock Cylinder

First off, a lock cylinder is the part of the lock where you insert the key. It contains a series of pins and springs that work together to allow the lock to open when the correct key is inserted. Different types of lock cylinders have different keyways and pin configurations. For example, the ANSI Mortise Keyway Lock Cylinder has a specific keyway design that is commonly used in commercial and residential doors.

Tools You'll Need

Before you start re - keying, you'll need a few tools. These include a plug follower, which helps keep the pins in place when you remove the plug from the cylinder. You'll also need a set of pinning tweezers to handle the small pins, a tension wrench to apply pressure to the plug, and a set of master pins and key pins. Oh, and of course, a new key that you want to use for the re - keyed lock.

Step 1: Remove the Lock Cylinder

The first step in the re - keying process is to remove the lock cylinder from the door. This usually involves removing a retaining clip or screw on the inside of the door. Once you've removed the clip or screw, you can gently pull the cylinder out of the door. Be careful not to lose any small parts during this process.

Step 2: Take Out the Plug

After you've removed the cylinder, you need to take out the plug. The plug is the part of the cylinder that rotates when you insert the key. To remove the plug, insert the tension wrench into the keyway and apply a slight turning force in the direction that the key would turn to unlock the door. Then, use a pick or other tool to push the plug out of the cylinder.

Step 3: Remove the Old Pins

Once you have the plug out, you can start removing the old pins. The pins are located in the pin chambers of the plug. Use the pinning tweezers to carefully pull out each pin. There are two types of pins: key pins and master pins. The key pins are the ones that are cut to match the key, and the master pins are the ones that sit on top of the key pins. Make sure to keep track of which pins came from which chamber, as you'll need to replace them in the same order.

Step 4: Measure the New Pins

Now that you've removed the old pins, you need to measure the new pins. You'll want to use a pin gauge to measure the length of the new key pins. The length of the key pins is determined by the cuts on the new key. You'll also need to select the appropriate master pins to go on top of the key pins.

1~1Aluminum Alloy Anodizing Single-head Cylinder 70mm

Step 5: Insert the New Pins

Once you've measured the new pins, it's time to insert them into the plug. Start by inserting the master pins into the pin chambers, followed by the key pins. Make sure that the pins are inserted in the correct order and that they fit snugly in the chambers. Use the plug follower to keep the pins in place as you insert them.

Step 6: Re - insert the Plug

After you've inserted all the new pins, it's time to re - insert the plug into the cylinder. Insert the plug into the cylinder and make sure that it rotates smoothly. If the plug doesn't rotate smoothly, you may need to adjust the pins or check for any debris in the pin chambers.

Step 7: Re - install the Lock Cylinder

Once the plug is back in the cylinder and rotating smoothly, you can re - install the lock cylinder in the door. Insert the cylinder into the door and replace the retaining clip or screw. Make sure that the cylinder is securely in place.

Step 8: Test the New Key

The final step is to test the new key. Insert the new key into the lock and turn it. If the lock opens smoothly, then you've successfully re - keyed the lock cylinder. If the lock doesn't open, you may need to go back and check the pins or make sure that the key is cut correctly.

Different Types of Lock Cylinders and Re - keying

As a lock cylinder supplier, I know that there are many different types of lock cylinders on the market. For example, the Sand Nickel Electroplating Mortise Thumbturn Cylinder has a unique design that may require a slightly different re - keying process. The thumbturn feature adds an extra level of security and convenience, but it also means that you need to be careful when re - keying to ensure that the thumbturn still functions properly.

Another type of lock cylinder is the Aluminum Alloy Anodizing Single - head Cylinder 70mm. This type of cylinder is made from lightweight and durable aluminum alloy, and it's often used in applications where weight is a concern. Re - keying this type of cylinder follows the same basic steps as other cylinders, but you may need to use different tools or techniques due to its specific design.

Why Re - Keying is Important

Re - keying a lock cylinder is important for several reasons. First of all, if you've lost your keys, re - keying the lock ensures that the lost keys can no longer be used to open the door. This provides an extra level of security for your home or business. Secondly, if you've moved into a new place, you don't know who else may have copies of the keys. Re - keying the locks gives you peace of mind knowing that only you and the people you trust have access to your property.

Contact for Procurement

If you're in the market for high - quality lock cylinders or need more information about re - keying, feel free to reach out to us. We're here to help you with all your lock cylinder needs, whether it's finding the right cylinder for your door or getting advice on the re - keying process.

References

  • "Locksmithing for Dummies" by Bill Phillips
  • "The Complete Guide to Lock Cylinders" by Locksmith Journal

Send Inquiry