What Is The Difference Between Rotary And Planetary Concrete Grinders?

Below we will go in-depth into what the difference is between rotary and planetary Concrete Grinders.

Rotary Concrete Grinders

Rotary grinders use a single large pad that spins at high speeds. Because these grinders have a higher rotational speed and are heavier, they are great for jobs that require heavy removal of surface matter.

A skilled operator will use the advantage of a heavy machine with a higher rotation speed to remove thick layers of mastic or paint. Rotary grinders can also create a better polish on concrete floors if done right.

However, because they’re heavier and have high-speed rotating discs, they’re often more difficult to maneuver. These grinders take more training to operate skillfully. Rotary grinders can often leave irregular scratch patterns in the concrete if the operator is not correctly trained.

Planetary Concrete Grinders

Instead of only using one disc like the rotary grinder, planetary grinders make use of multiple pads to get the job done. These pads spin simultaneously albeit at different speeds. Multiple discs with different abrasiveness allow a planetary grinder to remove material and finish a concrete floor at the same time.

These grinders are more lightweight and easier to maneuver than the rotary grinder. Their design allows the operator to maneuver in straight lines without having to struggle.

Because they’re more lightweight and easier to operate, planetary grinders work great for smaller jobs. They’re ideal for jobs that don’t require heavy concrete restoration—like smoothing and finishing a residential garage floor for an epoxy coating.