The angle grinder is a very useful tool when it comes to DIY in the house. It can be used for cutting, polishing and sanding various materials, but it is typically used on metal or stone.
There are many different types of blade available for this tool, so how do you choose the correct one for the task at hand?
Angle Saw
The types of blade available are designed to be used on different materials:
Dry cutting disc: These are generally useful for cutting through bricks, stone and similar materials. The have smooth edge with indents going back to the centre of the disk every centimeter or so - these are for thermal expansion of the blade. They can also be used for rough cutting of tile in order to get the basic shape you require. Dry discs can easily chip or mark tiles, if a precise smooth cut is required use a wet cutting blade. Wet cutting disc: Normally used if a smooth, straight line is required. The blade edge is smooth all the way around the circumference, and this works best on ceramic tile, stone and marble. You need a wet saw to use one of these discs, but the end result is well worth it. Whatever you do, do not attempt to use an dry angle grinder with one hand while pouring water over the blade! I have seen many unfortunate 'accidents' happen to workers that used this method - instead, buy a proper wet angle grinder. Dry/ Wet cutting disc: A hybrid blade that is similar to the wet cutting disc, but is more suited to being used on larger pieces of masonry. The edges of this blade feature small channels that aid cutting. Again, a wet angle grinder is required.