A Stepwise Guide To Learn How To Cut a Disc Lock

Key Takeaway

  • A disc lock is challenging to cut through as compared to other locks due to its shape and structure.
  • You may use an angle grinder to cut the shackle of a disc lock.
  • A blow torch may be used to cut through a heavy-duty disc lock.

If you have already gotten a storage facility for yourself, you are one step closer to a clutter-free life. The next step is to get your facility secured using an appropriate lock, and which lock is better for this purpose than a disc lock?

If you are unfamiliar, a disc or a circle lock is a disc-shaped lock with a curved shackle that goes along the circumference of the lock. The design of the lock makes it a secured lock for protecting your belongings. The best part about a disc lock is that the shackle of the disc lock is small to be exposed, making it hard to cut using a saw. The higher security of these locks makes them perfect locks for storage facilities and two-wheeler vehicles.

While it is a great sigh of relief to have your space or belongings protected by a lock that is hard to break into, the same feature can cause you some trouble if you lose the key to your lock and need to bypass it. Well, thankfully, despite the high security, there are a few ways you can cut a disc lock to open it.

In this article, we will talk about step-by-step instructions on how to cut off a disc lock.

Is It Possible To Cut Disc Lock?

Disc locks, also known as closed-shackle locks, are unique in their design as, unlike usual padlocks, the shackles of these padlocks are concealed. This definitely makes these locks difficult to cut with the help of saws and bolt-cutters.

The locks are gaining popularity for the level of security that they provide, but this does not mean that these locks are absolutely impervious to bypass. With the use of the right tools, it is possible to cut a disc lock. The level of ease or difficulty would, however, vary from lock to lock. A disc lock that is made of heavy-duty metal may be more challenging to cut than the usual disc locks.

How To Cut A Disc Lock

In this section of the article, I am discussing two effective ways to cut through a disc lock. While both methods help you remove them, they must be performed with precautions. In case you are not confident about performing the procedures, taking help from a professional locksmith is suggested.

Cutting Off A Disc Lock Using Angle Grinder

Cutting Off A Disc Lock Using Angle Grinder

Using an angle grinder is the most efficient way to cut your disc lock to access your space and belongings. 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. The cutting depth of the angle grinder being used to cut the lock should be around ⅛ inches. 

  • Step 1: Remove the retaining ring of the lock that holds the disc in place using a flathead screwdriver. You may also use a pair of forceps to do the same. 
  • Step 2: Once the disc is removed, you can proceed to cut through the lock shackles. You will need to make two cuts at the shackle. The first cut will be made at a point on the shackle where it meets the lock’s body. The cutting depth should be around ¾ of the width of the lock.
  • Step 3: About halfway up the shackle, make the second cut. You may need to make extra cuts if the shackle is thicker than typical.
  • Step 4: Use a pair of pliers to twist the shackle where the cuts are made to break and remove it to open the lock. 

It is important to take proper precautions while carrying out the process to avoid any injuries or accidents. Ensure that there are no pets or children around, and wear protective gear like gloves, facemasks, etc, before you begin the procedure.

Cutting Off A Round Padlock Using Blow Torch

Cutting Off A Round Padlock Using Blow Torch

Using the blowtorch is also an effective way to cut the shackles of a heavy-duty disc lock. However, this method has a few risks and must be performed with utmost care and precautions. Wear protective gear like gloves, a helmet, and a face mask before starting the procedure. Ensure that there are no children, pets, or flammable objects around.

Here’s how to break a disc padlock using a blow torch.

  • Step 1: Keep the lock sturdy by gripping the bottom of the lock with a pair of pliers. A vise grip plier is the best suited for this job.
  • Step 2: Aim the blowtorch on the lock’s shackle and light it for about 3-5 minutes. 
  • Step 3: Turn off the blow torch and let the lock cool down for about 2-3 minutes. 
  • Step 4: Next, carefully see the area where the shackle was heated to cut through it. If the shackle is concealed enough to prevent you from cutting through it, you may use a hammer to tap and break the lock where it is brittle.

Frequently Asked Questions 

Q1. Is it possible to cut a disc lock using a bolt cutter?

Answer – Since the shackles of a disc lock are concealed, it is very challenging to cut through a disc lock using a bolt cutter as there is not enough exposed area of the shackle. The repeated to and fro action of a bolt cutter will be challenging even if the bolt cutter is long-handled.

Q2. Can I get a new key made for my disc lock in case of a lost key?

Answer – You may get a new key cut for your disc lock in case the key is lost. One way to do so is by locating the serial number of the lock and contacting the manufacturers of the lock. The other way is getting help from a locksmith and getting a new key cut for the lock.

Q3. How to break a disc padlock using a pair of wrenches?

Answer – Breaking a disc lock using a pair of wrenches is not possible as, in this method, two wrenches hold the shackles from both ends to break the lock open. In disc locks, the shackles are concealed, and there are not many areas for wrenches to hold them. Hence, breaking a disc lock using a pair of wrenches may be very challenging or, rather, not possible.


Disc locks are great at securing storage facilities because of their unique shape. However, at times you may need to bypass them. While it may be challenging to open these locks without a key, the article talks about stepwise instructions on how to cut a round lock off. The exact procedure may vary depending on the size and shape of the lock, but in most cases, you’d get through the process. 

If you found the article helpful, do share it with your friends and family who might find the information helpful. Thank you for reading, and stay tuned for more information and know-how about home security. Write to me if you have any questions, I’d 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.