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Concrete grinders are used for surface preparation, coating removal, levelling uneven slabs and finishing floors to a polished result. Choosing the right machine depends on the job size and the finish you need.
Single-disc machines suit smaller areas and tight spaces. Planetary grinders use multiple rotating heads and cover ground faster - they also produce a more even finish on large floor areas. For edges and walls a handheld angle grinder with a diamond cup wheel is the practical choice.
Diamond tooling is the key variable. Harder bond segments work better on soft concrete. Softer bonds suit hard or dense concrete. Getting this wrong wears your tooling fast and slows the job down considerably.
Most machines accept wet or dry operation. Dry grinding needs dust extraction attached - concrete dust contains silica and poses a serious health risk without it.
Motor power ranges from around 1.5kW on lighter units up to 15kW on heavy-duty floor grinders. Match the power to the material hardness and the scale of the project.
