Nearly every construction project involves the need to cut concrete at a stage. Concrete is remarkably used for making the building's supports and foundations strong enough. That is why, when it gets hardened, it becomes challenging to modify it without proper tools.

Yes, out of several concrete cutting tools like bull floats, a contractor may use an angle grinder whenever he needs it. However, the angle grinder does not work on its own. It is generally used with a diamond cutting blade attached to it to cut masonry and concrete. Therefore, for applying heavy-duty deep cuts in concrete, the contractor must use a masonry cut-off saw.

concrete cutting

Cutting Concrete Utilizing Angle Grinder

Before getting into the details of using an angle grinder to cut concrete, first set yourself up for success. The first and foremost step thus is ensuring property safety measures like

  1. Wearing gloves for hand safety
  2. Utilizing safety gasses for eyes protection
  3. Having put on a face mask to limit the exposure to silica concrete dust

Also, it is vital to make sure that the cutting blades of the angle grinder are sharp and functioning correctly.

Determining the right size of angle grinder

Angle grinders are usually meant for more minor yet detailed cuts. That is the main reason that an angle grinder's standard size is almost 4.5 inches in diameter.

However, always keep in mind that when the cutting disc of your angle grinder is 4.5 inches. It will only be able to cut almost half the diameter, like 2.25 inches deep.

The deducted inches are of the clamping flange nut. That flange nut generally possesses an external diameter of one and a half inches. That indicates that the disc of this cutting tool can go around 1-inch deeper while cutting concrete.

How deep can concrete be cut with an angle grinder?

Angle grinders usually come in a range of varying sizes. Out of all, the two most commonly used sizes are 4.5- and 9-inches grinders.

  • A 4.5 inches angle grinder usually cuts down 1.5 inches deep concrete.
  • While a 9-inches angle grinder can cut concrete to a depth of 3.5 inches.

However, the depth of cuts does not depend on the physical size. Instead, the amps in its motor are a significant aspect determining how fast and how deeper cut it will make.

  • A 4.5 inches angle grinder generally comes with a 7-amp motor
  • On the other hand, a 9-inches grinder typically utilizes 13 amps motor.

Which discs are best for this concrete cutting tool?

Cutting down the concrete with an angle grinder is done best all the time with a diamond blade saw. Such blades are generally made from a uniquely engineered steel core. That, too, with having synthetic and sharp diamonds all around its edges.

However, choosing the right diamond blade with a grinder is a no-brainer. You may have a couple of different options to choose from when it comes to diamond cutting blades and discs referring to the rim's shape. The two most popular choices in this regard are:

  1. Continuous Blades

For having a better-quality cut in concrete, a continuous rim blade usually proves the best. In general, such discs work best as wet cutting tools. The water will remove extra dust and cool down the blade.

concrete cutting blades

  1. Segmented Blades

The separation in the toothed rim blade freely allows dust to rise out of the cut. Also, it permits continuous airflow, which cooldowns the blade. In this way, such cutting blades prove reliable for having a rougher cut in concrete.