How to Cut Concrete with an Angle Grinder

Concrete cutting is a common task at construction area, such as cutting concrete floors, walls or slabs. Although various concrete cutting saw can be used , angle grinder is the most convenient tool for concrete cutting. In order to complete your concrete cutting tasks safely and efficiently using an angle grinder, it is necessary to take several aspects into account. Here are some tips for cutting concrete with angle grinder.

Choosing right diamond blades for angle grinder

First and foremost, You can use dry cutting blades with or without water, but a wet blade must  be used with water. Actually using water with angle grinder is not easy because there are no wet cutting angle grinder at all.Generally there are three type of dry-cutting angle grinder diamond blades in accordance of their rim:

Segmented rim diamond blades have a toothed rim to help eject dust and cool the blade with air flow. One of the risks to the lifetime of a diamond blade is overheating, which affects the bond and can warp the blade. Segmented blades are the best option when water is not available. This kind of blades are used for brick, concrete pavers, masonry/block, reinforced concrete, and limestone. Segmented rim diamond blades are typically preferred for cutting concrete with an angle grinder.
Turbo rim diamond blades are specifically designed to get a faster cut speed for both wet and dry cutting. The turbo rim lets air flow pass through its smaller turbo segments to cool the blade. The small holes scattered on turbo rim blades are also designed to increase the cooling capabilities. besides, the angle of turbo segments are designed to help push out the material out. This blades are used for cutting concrete, brick and limestone effectively.
Continuous rim blades are used for cutting marble, granite, porcelain tile, and ceramic tile. It’s most preferred for wet cutting. Continuous rim blades are not preferred to cut concrete with an angle grinder.

Protect Yourself

Whenever you cut concrete, wear sight, hearing and respiratory protection, especially when dry-cutting.

1, make sure that the safety guard on the angle grinder is in place and secure before your concrete cutting work.
2, Avoid wearing any loose clothing and use gloves to protect your hands and improve your grip.
Small particles of concrete can come loose and fly off during the cutting process, which can present a real hazard.
3, Use a pair of protective goggles to ensure that you do not get any debris in your eyes. It is also prudent to wear a face mask to reduce the risk of breathing in any concrete dust.

Operate The Angle Grinder Correctly

1. Prepare work area for your cutting work
Aware of potential tripping hazards, Ensure that your work area is cleared of any unnecessary things.
Ensure that it is properly ventilated If you are working indoor.

2. Mark Cut Line with pencil and chisel.
To make straight accurate cut with the angle grinder, you should mark the position of the line to cut with a straight edge. then use a chisel to score along the pencil line, making sure that the resulting groove is deep enough to hold the blade. This process will ensure that the blade is not in danger of skidding across the surface.

3. Keep the angle grinder steady.
Before using the angle grinder, try it out for grip and test the weight to ensure that you can handle it. Most grinders will have two handles that will help to keep the tool steady, and you should check its stability and make sure you can hold it comfortably with your dominant hand.

 4. Keep both hands on the grinder and wait for the blade to reach full speed and ensure that you are braced for the gradual change of the strength. Now apply some pressure to pass the blade through the concrete. Don’t force the blade into a cut. Make a series of gradually deeper cuts to avoid overheating the blade.

5 ensure that it is switched off at the power source when it is no longer required.


Cons of cutting concrete with an angle grinder

Certainly an angle grinder has sufficient power to cut concrete materials . But it will probably perform poorly compared to a wet .

A walk behind concrete saw uses water to keep diamond saw blade cool, but there’re not water cool component in angle grinders. The consequences of this are that your diamond blade would wear quickly when cutting an extremely hard substance such as reinforced concrete.

If your concrete cutting work are really occasional, a manual angle grinder works fine for light-duty cutting work. A concrete saw is essential for heavy duty concrete cutting.

Leave a Reply

Your email address will not be published. Required fields are marked *