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Originally Posted by wdfifteen
Great info!
I've been looking at replacing the whole slabs or grinding down the edge of a couple of sidewalk sections that have heaved up. I wasn't sure how I was going to grind them down. Having the slabs replaced is going to cost $300. If this 4" cup wheel will work on my Ridgid 4" angle grinder that would save mucho $$$. I assume this cup wheel is made for the angle grinder I have. I didn't know that cup wheel existed.
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I will bring popcorn, a chair and a 6 pack for ya. Sure it will works but it will take you a long time and lots of cussing,not to mention 4" grinder maybe spinning way too fast for that wheel. If appearance is not important, try a diamond cutting wheel and ease the edge to eliminate tripping hazard. For 300 bucks, its a no brainer to hire out and remove the slab.
We rent the grinding tool if and when we need to grind down a floor. They have a water hose hook up to knock down dust. My flooring guy has a 7" angle grinder made specifically for this propose. Its not an angle grinder but a specific tool for grinding concrete. Cuts dust free too. They use it to remove dips and high spots on a concrete floor before hardwood install.