How to choose the right Diamond Blade

1. The Price

What is the most important factor for you? The initial price of the blade or the cost per cut? For smaller jobs, or occasional use, a lower priced blade like our 3 or 4 star quality may be preferable. For larger jobs, or regular use, a higher priced blade will actually be less expensive to use because it will deliver the lowest cost per cut. For large jobs, or continuous use, we recommend our 5 or 6 star products For larger jobs, the lowest possible sawing cost per cut or metre is usually much more important than the initial price of the tool.

2. The material to be cut

Correctly identifying the material(s) you are going to cut is the most important factor in choosing a blade. It directly affects the cutting speed and the life of the blade.

Most materials will fall into the following categories:

  • Hard Materials - Granite, Clay Products, Flint Concrete, Engineering Brick
  • Medium Hard Materials - Concrete Products & Building Materials
  • Soft & Abrasive - Bricks, Blocks, Concrete Roof Tiles
  • Extremely Abrasive - Asphalt, 3 Newton Concrete Block

When cutting hard materials, such as Granite, a soft bond is required. The soft bond will release the diamond grit at the point of the maximum utilization, without the danger of the bond holding the grit for too long, which would cause the blade to overheat and stop cutting.

When cutting medium hard materials, such as concrete Kerbs & Slabs, a medium hard bond type is required. This bond provides the right balance needed to keep the diamond grit fully exposed and at the same time ensures the material wears the bond at the correct speed, giving the best possible life. Most universal blades will be a medium bond product.

When cutting soft materials, such as Asphalt or 3 Newton Block, a hard bond is required. This hard bond will hold the diamond grits longer so they can be more productive. If you use a soft bond to cut soft material, the bond will release the diamonds before they have reached maximum utilization and good diamonds will be lost prematurely. The blades will still cut adequately but productivity will be poor.

Most diamond blades cut a RANGE of materials. However, the material should be matched to the blade as closely as possible. As a general rule, determine the material that will be cut most often or the material for which blade performance is most important and then select the most appropriate blade type (bond).

3.Wet or dry cutting

Choosing wet or dry cutting may be a matter of user preference or job requirement.

When using a hand tool such as an electric grinder, it is not safe to use water because of the electrical power source. For floor saws wet cutting is usually preferred because you can cut deeper when using water as a coolant. For tile and masonry saws, either wet or dry cutting can be used, but when used with water the blades will cut quicker and last longer. For hand held petrol saws, dry blades are more popular, but they are often used wet as a form of dust control.

Wet blades MUST be used with water. Dry blades may be used either dry or wet as the job or equipment allows.