Cut/trim concrete

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Old 08-20-15, 01:27 PM
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Cut/trim concrete

I just got a Ryobi AG 4531G angle grinder and some 4 1/2 masonry cut off discs. When I opened the angle grinder up, I see that they say to never use cut off or type 1 discs.
I have a 7 1/2 inch circular saw I've been using to cut concrete ( a very sloppy foundation job that a local contractor did), but need to get into some tight corners that I thought an angle grinder would do.

Will this not work? I'm ready to return the angle grinder if I can't use it for this.
 
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Old 08-20-15, 05:16 PM
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Not sure why they don't want you to use cutoff disks....everybody does. But for concrete I'd recommend a wet/dry cut diamond blade...lot less dust, lasts way longer, and cuts cleaner. Not that expensive in 4 1/2 size.
 
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Old 08-20-15, 06:46 PM
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Yep, use a diamond blade. I cut through both sides of about 20' of a 5' high block wall so I could knock it down in sections. The abrasive disks I had lasted about 10-15' of cutting, bought a diamond blade and it did the majority of the wall. Still cutting just fine at the end. Still dusty, wear a mask and eye protection.
 
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Old 08-21-15, 09:52 AM
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Is this unique to Ryobi?

Thanks guys! This says to use only Type 27 depressed center wheels (recessed, or indented hubs) that fit into the recessed part of the arbor or spindle on the machine. "Never attach a Type 1 sraight or cut-off wheel..."

Is this setup unique to Ryobi, or are they all like that?
 
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Old 08-21-15, 02:41 PM
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I got this working. It won't get into the tight spaces I need, but otherwise does a good job.
 

Last edited by Chris12; 08-21-15 at 05:04 PM.
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