How to Cut Round Ductwork


Ductwork is always needed in heavy machinery-related affairs. Besides, in the industrial buildings to run the HVAC system properly, ductwork is enormous. But these ducts are not always in good shape, and there is still a requirement of cutting the product according to the need of the user. For this reason today, we are suggesting a method on how to cut around ductwork. This will be much beneficial for beginners to learn the technique beforehand.


For this process there is a need of few elements, among them first you will require a snap-lock pipe, this is the duct you want to trim, next you will require a tape measure, this will allow you to have a proper measurement while cutting, and after that, you will require a marker for marking the sizes. You will also need to have snips which will be used to reduce, and lastly, to crimp the duct, you will need a five-blade crimper.

How to Cut Round Ductwork


The steps required to be followed for cutting the round ductwork are stated below in a chronological manner for the learners’ better convenience.

  • Step One

At first, you have to take the snap-lock pipe that you want to cut and then measure the length of the tube, and then you have to decide the extent that you want to keep. This will be your preliminary job after you have gathered all the necessary tools for the task.

  • Step Two

Now you have to take the measuring tape and then use a marker to mark the dimension up to which you want to cut. You can use two ways to mark the border. At first, you have to attach the front end of the measuring tape and then mark the point with a maker and continue it at a distance of one foot around the duct.

  • Step Three

You can also place the marker and then turn the duct, and in this way, you will get a circular shape around the conduit, which will help you while cutting the pipe. Now once the marking is finished, you have to start by taking a snip. This will help you to reduce the pipe. But make sure that you wear gloves while cutting the cut because this has sharp edges.

  • Step Four

The cutting can be done quickly, go through the line that you have drawn and use the snips to cut it, as it I a circular object s you can easily cut hindered while ripping, so we suggest that you cut off the extra duct and then again go for the mainline. In this manner, the process will be completed, and you will get the required amount of ductwork.

  • Step Five

Lastly, you have to take a five-blade crimper. This will allow you to have proper crimping along the edge of the pipe. Thus the thermal effect on the pipeline will be compromised. The crimping should be done by marking a line and then applying the machine.


Lastly, we would like to express our heartfelt gratitude for providing precious time to go through our content. We hope that the technique that we have exhibited will help you learn and develop your skills. Have a beautiful day!!

We will be happy to hear your thoughts

Leave a reply

DIY Quickly