Cut/trim Concrete - Concrete, Stone & Masonry - DIY Chatroom Home Improvement Forum

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Old 08-21-2015, 12:02 PM   #1
Join Date: Sep 2012
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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, it 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?

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.


Yod12 is offline   Reply With Quote
Old 08-21-2015, 01:54 PM   #2
Join Date: Jun 2009
Location: atl & hilton head
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if you're cutting conc, use diamond blades (ebay - $4 ea),,, we use 4" grinders all the time w/diamond blades - NEVER masonry blades,,, UNLESS you can use a hot press blade (edmar), all the others are a waste


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