How to Select Suitable Diamond Blades

by Hanjiang Wang, Diamond Blade Select
January 9th, 2009. Copyright © 2008-2014. All rights reserved.

If you can manage to select a diamond blade which is suitable to your work, you will improve your work efficiency and lower your costs, so it’s worthy for you to know some methods.

There are many factors which influence the performance of diamond blades. Here we suggest some ideas from 3 aspects:

1. The Features of the Diamond Segments of a Diamond Blade

The features of the diamond segments of a diamond blade mainly include its diamonds’ grit (size), toughness and concentration, and its bond’s hardness and abradability (Normally, the harder is the bond, the higher is its abradability.). These features should be suitable to the nature of the stone to be sawed. In addition, different uses of diamond blades need different features.

The following table lists some suggestions considering these factors:

Suggestion for Diamonds’ Size, toughness and Concentration Suggestion for the Bond
Nature of Stone High Hardness and Density The diamonds’ size should be small, toughness should be high, and concentration can be a little bit lower (25% – 30%). This combination can guarantee the cutting efficiency. The bond should be softer, and then the new diamonds can be more easily exposed.
Low Hardness The diamonds’ size can be big, toughness can be medium, and concentration can be a little bit higher. This combination can get good cutting efficiency, and at the same time prolong the blade’s life. Bonds with better abradability should be chosen to prolong the blade’s life.
High abradability The high toughness, bigger size and high concentration diamonds should be chosen. The bond should be harder, and of good abradability.
Use of Diamond Blade Big Diameter Blades for Cutting Surfaces The diamonds’ toughness should be high; size should be big (36#-60# grit); concentration can be low. This combination can guarantee the high cutting efficiency. Bonds with good abradability should be chosen to prolong the blade’s life.
Small Diameter Blades for Cutting borders Diamonds of medium toughness and 46#-70# grit can be chosen. This combination can not only guarantee the cutting efficiency, but also improve the cutting quality. Bonds for easily exposure of diamonds should be chosen to guarantee the cutting quality (smooth and without the loss of edges and corners).

2. The Diameters and Shapes of Diamond Blades

The diameter and shape of a diamond blade should be chosen according to the dimension of the stone to be sawed and the requirements of processing quality.

For example, the diameter of a diamond blade normally should be bigger than 3 times of the maximum thickness of the stone. Diamond concrete saw blades‘ diameter is often bigger than or equal to 300mm.

The shape and structure of a diamond blade should be chosen according to the requirements of processing precision. When the requirement is producing a smooth surface or the products are thin and of easily border-broken, narrow-gullet diamond blades should be chosen. When the requirement to products’ surface is not high or the stone is thick, wide-gullet diamond blades can be used.

3. The Equipment Conditions of Cutting Machines

  • For the cutting machines which are not precise, it is better to choose the diamond blades with good-abradability bond.

  • For those new and precise cutting machines, diamond blades with softer bond (more easily expose new diamonds) can be chosen.

  • For the cutting machines whose line speeds are low, it is better to use the diamond blades with good-abradability bond.

The tips in above 3 aspects apply to not only stone, but also concrete, asphalt, bricks, and many other building materials.

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