How To Choose The Best Diamond Pad For Concrete Countertops(2)
A good balance of these factors is the large number of channels, which are large in proportion to the diamond-covered surface. This provides flexibility for the pads while still allowing efficient removal of cuttings and a large percentage of the diamond area. In contrast, pads with very large channels and very large diamond "islands" are often inflexible.
Although it is easy to see the thickness and channel pattern of the diamond pad, it is almost impossible to evaluate the quality of the diamond used in the pad, or the grade and quantity of diamonds. In the end it is diamonds to cut, and they make the pads expensive. The better the quality of the diamond, the better the grade, and the more diamonds in the pad, the more expensive the pad will be.
The most expensive pads use the best industrial diamonds. The concentration of diamonds is high (each manufacturer optimizes the quality and quantity of diamonds in their pads), and the grades are narrower. Like sand and gravel, diamonds come in various sizes. A narrow grading means that almost all diamonds are of the same size, so the size of the disc is a more accurate description of the grading of diamonds. Any changes tend to be smaller diamonds, which will not affect the quality of the concrete surface.
Cheap pads use low-grade diamonds. These tend to have more defects and worse grades. In addition, fewer diamonds may be used in the pad. Normally, the grain size is larger, so a 100-grit pad may actually have a large number of small diamonds and some rough diamonds (such as 70-grit). This results in lower surface quality (more scratches) and slower cutting (because there are more small diamonds in the pad).
The adhesive that encapsulates the diamond is as important as the diamond, and it has a profound impact on the performance and life of the pad. Binder materials range from ceramics to resins, and different materials are used for specific applications. The hardness of the binder is very important. When dealing with abrasive materials like concrete, binders that are too soft will wear away quickly.
Almost all wet polishing pads use resin binders, and the resins are also different. The pad dispenser rarely describes any meaningful details, so here, personal observation and reliance on trusted recommendations are necessary conditions for making a good choice. Usually, the cheapest pad uses a soft resin adhesive, which wears out quickly. If you end up using three times as many pads as you would with a pad that costs twice as much, you are not saving money in the end.
Ceramic binders are more wear-resistant and resistant to high temperatures than resin pads. Many dry pads use ceramic blinders, which helps prevent the smearing and glazing that can occur when the resin-based dry pad is running at too high a speed.
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