A Stepwise Guide On How to Open a Disc Lock Without a Key

Key Takeaway

  • It is possible to open a disc lock without a key using specialized tools such as a lock picking hook, an angle grinder, a drill, or a blow torch.
  • Using a lock-picking hook is the safest way to open a disc lock without a key.
  • Cutting the disc lock with an angle grinder or drilling the lock to open would render the lock unusable.

It was a beautiful Saturday morning, and I was on my way to the park to take advantage of the sunny weather when my friend, who was riding on a bike through the lesser-known roads of GTA, called me to ask, ‘how to open a disk lock without a key?’ 

He had misplaced the key to his bike disc lock, and after a few minutes of scrambling and rummaging around, he had no choice but to find an alternate way to open the disc lock. We were both dumbfounded, knowing that the bike was unusable in a far-off land unless we could figure out how to open the lock.

I remembered I had seen some articles online about how to open disc locks without keys, so I grabbed my phone and started searching for information. After a few minutes, I had enough information to help him out. Seeing the successful results of our hard work, I was filled with satisfaction, and my friend celebrated with a sigh of relief. 

Afterward, I knew that it was time to spread this knowledge around. That’s why I eventually ended up writing a blog post on how to open a disc lock without a key. Hopefully, this post can save the day for someone who finds themselves in a similar predicament.

What Is A Disc Lock?

What Is A Disc Lock?

A disc lock is a unique padlock shaped like a circular disc. It uses a pin and tumbler locking mechanism and features a shorter, rounded, closed shackle that is integrated into the circular lock body. Disc locks offer enhanced protection due to their diminutive shackles, making it much more difficult for someone to cut through compared to regular open-shackle padlocks. Consequently, these are the optimal locks to be utilized for two-wheelers and storage spaces that require extra protection than usual.

How To Open A Disc Padlock Without a Key

Before attempting to open a disc lock without a key, it’s important to consider all the risks associated with the process and understand how to use each tool properly.

Pick The Disc Lock Using A Hook And Turning Tool

Pick The Disc Lock Using A Hook And Turning Tool

If you’re looking to open the lock without a key, one of the most popular methods is to use a lock-picking tool. This method involves using an “L” shaped metal pick to manipulate the pins inside the lock cylinder in order to unlock the device. 

Here’s how to do it,

  • Step 1: Start by inserting the pick into the keyway of the lock. The pick should be pushed all the way in until it comes to rest on the back of the lock cylinder.
  • Step 2: Slowly begin to manipulate the pick, applying pressure up and down on each pin. Be sure to apply gentle pressure and avoid jiggling or jerking the pick around.
  • Step 3: As you maneuver the pick, you’ll start to feel some resistance as you push past each pin. When you feel the resistance, you’ll need to rotate the pick in order to lift each pin one at a time. 
  • Step 4: Once all of the pins have been lifted, the plug inside the lock will be free to rotate, and the lock will open.

With a bit of practice, you can use this method to open a disc lock without a key in just a few minutes. Of course, it’s always best to practice with a spare lock before attempting to pick any locks that are important to you.

Cut The Disc Lock Using An Angle Grinder

If you have an angle grinder and the skills to use it, this is the most effective way to open a disc padlock without a key. To begin, you will need safety goggles and ear protection to avoid any injuries.

  • Step 1: Start by clamping the lock into a vise. Do not carry out the procedure by holding the lock, as it can lead to serious injuries. 
    clamping the lock
  • Step 2: Next, take an angle grinder with a cutting depth of around ⅛ inches. If you don’t own the tool, you can either purchase an angle grinder from a hardware store or online or borrow it from a neighbor or a friend.
  • Step 3: Adjust the disk so that it can cut through the metal. Make sure the disk is adjusted to a depth that will only cut through the shackle of the lock and not the body. 
  • Step 4: Once the disc is adjusted, start grinding away at the padlock. You may need to move the grinder around the circumference of the lock until you have fully cut through. 

Once the disc lock is cut off, you can now open it and remove it from the shackle. Be sure to dispose of the lock properly once you are finished. Be sure to take proper precautions while carrying out this process. Make sure there are no pets or children around and wear protective gear like gloves and facemasks. 

Drill Open The Disc lock

Drill Open The Disc lock

If you are unable to pick the disc lock or cut it with an angle grinder, then drilling is your last resort. To open a disc lock without a key using a drill, you will need a power drill, a drill bit, and a metal file. 

  • Step 1: Start by positioning the drill bit at the top center of the disc lock. When the drill bit is in place, turn on the drill and begin drilling. Apply pressure as you move the bit further into the lock. The goal is to create a hole in the disc lock that will fit a metal file. 
  • Step 2: Once you have drilled a hole, use the metal file to break through the remaining metal. If necessary, use a flathead screwdriver to help remove any metal pieces that are stuck inside the lock. 
  • Step 3: Continue to use the metal file to enlarge the hole until it is big enough to slip into the tip of the file. 
  • Step 4: When the hole is large enough, you should be able to reach in with your fingers and grab hold of the locking mechanism. Gently pull out the locking mechanism, and the disc lock will open.

If you find that the locking mechanism is stuck, use some lubricant or WD-40 to loosen it up. With some patience and the right tools, you can easily open a disc lock without a key. Be sure to take proper safety precautions when drilling or cutting into locks.

Use A Blowtorch To Open A Disc Lock

Use A Blowtorch To Open A Disc Lock

Using a blow torch to open a disc lock is an effective but hazardous method. To avoid any accidents and burn injuries, it is vital to wear protective clothing such as heat-resistant gloves, safety goggles, and long sleeves.

Follow the steps given below to open your disc lock using a blow torch.

  • Step 1: To start, grip the bottom of the lock with a pair of pliers to keep it sturdy. 
  • Step 2: Then, aim the blowtorch onto the shackle of the lock and light it for 3-5 minutes.
  • Step 3: After turning off the blowtorch, let the lock cool down for 2-3 minutes. 
  • Step 4: Carefully check the area where the shackle was heated and try to cut through it. If the shackle is too thick and concealed to allow you to cut through it, use a hammer to tap and break the lock at its weakest point, where it’s brittle.

By following these steps, you can learn how to open a disc padlock without key and gain access to what’s inside. However, if used incorrectly, this method can be very dangerous. So always make sure to take the necessary precautions before attempting to open a disc lock with a blow torch.

Frequently Asked Questions

Q1. Can I open a disc lock using a pair of wrenches?

Answer – It is not possible to open a disc lock with a pair of wrenches because, with this technique, the shackles are held in place from both ends while the lock is being opened. Since the shackles are hidden in disc locks, there aren’t many places for wrenches to grip them. Therefore, employing a set of wrenches to unlock a disc lock may be extremely difficult or even impossible.

Q2. How to open a round padlock without a key using a bolt cutter?

Answer – The shackles of a disc lock are concealed, making it challenging for anyone to cut through a disc lock using a bolt cutter as there is not enough exposed area of the shackle. Even if the bolt cutter has long handles, the to-and-fro motions will not be possible due to the structure of the disc lock.

Q3. If my disc lock key is lost, how to get a duplicate key for the lock?

Answer – If you lose the key to your disc lock, you can get a new one by finding the lock’s serial number and getting in touch with the manufacturers. The alternative is to work with a locksmith to have a new key made for the lock.


Knowing how to open a disc lock without a key can come in handy in many situations. With the right tools and techniques, you can open a disc lock quickly and easily. Depending on the type of disc lock you are dealing with, you may need to use a hook and turning tool, angle grinder, drill, or blow torch. It is essential to take your time and be careful when using any of these tools. 

By following the steps mentioned in the article, you can successfully open a disc padlock without a key. For any other assistance on disc locks, write to me in the comment section. I shall be happy to help!

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Hey! I am Mark. Though I am not a locksmith by profession, but locks have always fascinated me since my teens. And it all started when I got locked out of my house and I had to pick the lock. Since then it has become my hobby to learn more about different kinds of locks, understand their working and methods to pick them up. In due course of time, I have also become better aware of how installing the right lock goes a long way in ensuring iron clad security. I aim to share my passion (about locks) through this blog. If you are also passionate about picking locks or are just looking to beef up the security, hop on the ride.