There are many different diamond polishers available of various sizes, speeds, electric versus air, etc. CCI has selected only the best polishers. Here are the polishers we recommend and why.
An air (pneumatic) polisher is an important tool for a concrete countertop pro to have. Because it is not electrically powered, you cannot be shocked by this tool if it gets wet while you’re polishing edges. It is also extremely lightweight and non-fatiguing.
The disadvantages of this type of tool are:
- It requires a large air compressor, which is expensive. However, the air compressor will also run several other tools in your shop, such as your GFRC backer sprayer, so it is a worthwhile investment.
- It is not powerful enough to run 7″polishing pads or 5″ and larger turbo cups. For this reason, we recommend you also have an electric polisher that you use for heavy duty grinding. See below for information about our recommended electric polisher.
We have found the Alpha AIR-680 to be the best air polisher in terms of power, production speed, versatility, durability and quality. Its powerful gearing, efficient turbine design and quality of manufacture mean it will power through thousands of square feet of polishing without needing much more than daily oiling.
(NOTE: Alpha recently discontinued the AIR-680 and now offers the AIR-830 and the AIR-850. The AIR-830 is most suitable for polishing concrete countertops. The AIR-850 spins too fast for 5″ and 7″ pads.)
Although we are not able to stock and sell an electric polisher, we do recommend that every concrete countertop professional have an electric polisher for heavy-duty grinding of large areas using 7″ diamond pads or aggressive grinding for large exposed aggregates using 5″ or larger metal bond turbo cups. Air polishers are not powerful enough for this job.
If you do not have an air compressor, you could choose to use an electric polisher exclusively. However, you need an air compressor for spraying GFRC mist coat.
The DS3011 by Inter-Tool is the gold standard in planetary polishers. Its triple-sealed bearings and gear/chain drive make it extremely reliable and durable. There is no belt to break, and the bearings don’t wear down due to grit. The three heads are extremely well-balanced for an even polish with very little effort.
This machine is worth a couple hundred extra dollars versus the cheaper alternatives, which is why it is the only planetary polisher that The Concrete Countertop Institute recommends.
Inter-Tool has new owners who are dedicated to customer service. They also offer this machine in 230V, 5oHz power for the European and Australian markets.
More about diamond polishing:
See this page for information about diamond pads, and extremely important component of achieving a high quality polish.