ᐅ Angle grinder for cutting multiple paving stones and curbstones?

Created on: 3 Jun 2021 08:20
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MaxMustaman92
Hello,

We are planning to pave about 40m2 (430 sq ft) on our property soon. The paving stones are approximately 10cm (4 inches) high, and the edging stones about 25cm (10 inches) high.

I have heard that some people cut the stones using angle grinders. For the borders and especially for the rows of paving stones, I will need to cut regularly. From what I have found online, angle grinders should have at least 23cm (9 inch) blades and 1500 watts. However, I have also seen opinions stating that 12.5cm (5 inch) diamond-coated blades and 750 watt machines are sufficient.

So my questions are:
- Based on your experience, what specifications should an angle grinder have for this kind of task?
- Is an angle grinder enough, or would it be better to rent a proper stone saw somewhere? Buying a new one probably isn’t worth it for this small project.
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driver55
3 Jun 2021 11:57
Rent a wet saw from a tool rental center. Using anything else won’t work if you have never handled the equipment (angle grinder for cutting stones) before.

Unless you plan to lay pavers for one day and spend three days cutting.
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Alex124
3 Jun 2021 12:03
nordanney schrieb:

Professional tool from Bosch, for example.
Use a tool with a 230mm (9 inch) disc (a really "heavy-duty" one), plus a water hose so you can cut wet. This way, the stones can be cut like butter.

I find this tip for a beginner somewhat concerning… because of the angle grinder, water, and all that…
manohara3 Jun 2021 13:46
MaxMustaman92 schrieb:
The paving stones are about 10cm (4 inches) high, the edging stones about 25cm (10 inches) high.

So you are specifying a height that you want to cut. Is the stone wider in the other dimension?

Ideally, the saw blade should cut all the way through the stone. Cutting from both sides is possible but considerably more complicated and requires more skill.

You can also score the stone and then break it with a chisel. However, this does require experience. I tried this with a chisel purchased specifically for this purpose but without experience — sometimes it worked, sometimes the result was quite uneven...

It is also important how you can secure the stone while cutting. If the piece is small, it becomes more difficult.

In any case, such a project is doable for non-professionals but definitely challenging.
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danixf
3 Jun 2021 13:51
For just a few square meters, you can rent a stone splitter for around 20€ and borrow a small angle grinder for the curbstones. A cheap disc is good for 4-5 cuts and costs about 3-4€.
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hanghaus2000
3 Jun 2021 13:55
motorradsilke schrieb:

But rather plan the area so you don’t have to cut the paving stones. That will save you a lot of work.

That is definitely the best idea.

@MaxMustaman92 if you want to cut dry, don’t forget to wear respiratory protection.
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MaxMustaman92
3 Jun 2021 18:58
Thank you for all the tips!

Could you give me a keyword for paving without cutting, or does this only apply to the stone arrangement where each stone is placed exactly the same size over the other? In any other arrangement, wouldn't one stone be longer than the other, or individual free corners remain exposed?