Is it possible to saw off wood, plastic or rubber with a cardboard disc on a grinder?

It would seem that cardboard is a very fragile material that is not capable of working as a cutting material. Yes, but everything changes if the speed of rotation of the cutting blade made of cardboard is thousands of revolutions per minute. The cardboard turns into a razor at these speeds.

The disc is cut from ordinary cardboard. With the help of marking with a compass or, you can circle the disc for metal for angle grinders. Corrugated cardboard will not work - the cutting efficiency is low. The thinner the cardboard, the better.

You can cut off with such a disk not only plastic, wood or cut rubber, but also carefully cut drywall (where filigree is needed).

Process video:

Many people believe that this is some kind of special cardboard, with an abrasive, for example, thanks to it, such efficiency is created. But, no - this is ordinary cardboard. At high speed, any material is capable of working as a cutting tool. Moreover, if its melting point is high. And cardboard does not melt - it only carbonizes at high temperatures (from friction) and grinds off (because its strength is low). But this material is practically free.

The link under the animation of the process has comments from those who thought that this disc is for sale, that it is made of special cardboard.

What is the practical side of this method? For example, this will help if there is nothing at hand that would help to saw off a PVC pipe (except for a grinder). Or you need a straight saw cut on a wooden block, but there is no saw or electric jigsaw. A disc for metal angle grinder will melt plastic, and wood will char. Its thickness and the material itself are not suitable. As you can see, a free cardboard disc will handle this.

Another video with the process of sawing different materials with a cardboard disc: https://youtu.be/GiOrCSWymS0

An important point - the cardboard disc is safe. Even if it is squeezed or you tilt the angle grinder in the process of work and the disc will break - the disc will simply break. Paper pieces will fly off at most. But the protective cover will prevent them from flying in your direction. In any case, you should always wear safety glasses.

***

Subscribe to the channel, add it to your browser bookmarks (Ctrl + D). There is a lot of interesting information ahead.