How Diamond Grinding Cup Wheels Works for Concrete Floor
Mar 26,2020

Studying how diamond grinding cup wheels for concrete  grinding is must learn for the contractor who wants to be successful in this concrete industry.  As a diamond grinding cup wheels manufacturer with over 20 years of experience, we know how many factors during production, they all impact the performance of each diamond cups wheel. It is easy to copy the shape and design of diamond grinding cup wheels, but difficult to make exact bond matrix and formula.


Here are some factors about diamond grinding cup wheel that would give you a sense of why diamond cups are not all the same, and how this affects your grinding and works to the concrete floor. The two terms most often used are grit and bond. Diamond cup grinding wheels are made of synthetic diamond powder, measured in microns and called grit, and a bonding material, usually metal or resin, or a combination of bonding materials. They are bonded together through injection molding, hot and cold pressing, electroplating, and vacuum brazing, silver welding.


Each grit is designed to refine the scratch pattern, and the rule of thumb is each consecutive grit to be approximately doubled in size, so it can remove the scratches of the previous step. For example, if you start with 30 grit, the next grit is 50 or 70, then 100 or 120, 200 or 220, 400, 800, etc. Following right grit sequence is a fundamental principle in concrete processing. Skipping a grit step will put you up against some serious scratched concrete floor challenges.


concrete diamond grinding cup wheels



The grit steps are divided in 2 stages - grinding and polishing

CONCRETE FLOOR GRINDING

Grinding includes the steps from the lowest starting grit (it depends on the concrete floor and could be as low as 6 grit but typically 30 or 50 grit) up to 120 grit. The diamond grinding cup wheel used here are usually metal-bond tools, silver welding method for grinding, or pcd diamond grinding cup wheels for coating and glue removal. There are many shapes and designs of diamond segments in the market – double row, arrow shapes, single row, T shape segments, and many types. The more important is the bond and formular for the diamond segments. Many contractors have trouble understanding how bonds work relative to different kinds of concrete. Depending on the bonding material, diamond grinding cup wheels have different hardness which determines how diamonds are exposed.


· Hard concrete requires a softer bond to prevent glazing and to allow new diamonds to get easily exposed for maximum cutting.

· Soft concrete requires a harder bond of diamond grinding cups, so it can last longer (soft bond will cut but it will wear out too fast on soft concrete).


CONCRETE FLOOR HONING POLISHING

Honing includes the steps between 100 to 400 grit, the diamond tool used in this stage are usually hybrids and/or concrete resins polishing pads. The hybrids, made of a combination of bonding materials – metals, resins, or ceramics, are especially useful for removing scratches left by the metal bond tools, such as ceramic polishing pads, resin polishing pads. Most of them are 3 inch diameter.  Polishing is from 800 grit up to 3000 grit. The most popular choice for concrete polishing are resin pads/pucks, which are made of ChinShine,  poly-phenolic and ester-phenolic. Another good solution are diamond polishing pads that use felt and drops of resin, offered all the way up to 8500 and Buff grit for maximum floor shine.


When choosing diamond tools for honing and polishing, keep in mind there are polishing tools designed for wet use only, dry use only or wet/dry use. Improper use can cause problems like glazing, sticky residue on the floor, and so on.


Following all the grits may seem like a lot of steps, but well-trained contractors know that this is crucial for proper concrete floor refinement and achieving a good wear-resistant floor finish. It is tempting to buy the cheapest diamonds grinding up wheels for concrete grinding and polishing is a very labor-intensive business and lost productivity and time spent redoing a floor is much more costly. The key is that not all diamond grinding cup wheels are created equal, and diamond tools should be always chosen relative to a specific project. Studying what kind of concrete you are about grinding and polishing with is important for selecting the right combination of bonds and grits which will increase your productivity, and make the best concrete floor finish.

ChinShine is a professional diamond grinding cup wheel manufacturer, we makes over 5,000 pieces every month, people can see lots of large building, concrete projects using ChinShine diamond grinding tools. Send inquiry to us, you can expect a response in 24 hours!


Related Article:

1. How to buy diamond grinding cup wheel and diamond core drill bits?

2. How to make diamond segments formula/bond ?
3. How to Use Diamond Concrete Cutting Blade for Dry Cutting?

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