I am about to rent an Edco concrete grinder to re-do some spots on my floor. It comes with either stones or diamond grinders. What are the differences between the two? I would like to level some areas before re-applying the acid, epoxy, etc, etc. In other areas where I only have sealer and stain I would like to polish the floors. Thanks!
Edco Grinder Experience Anyone?
- Thread starter tubeman
- Start date
bajones9181
Member
I rented an EDCO grinder before putting epoxy on my floor. I would highly suggest using the diamond inserts instead of the stones because they cut better. Even with the diamond inserts don't expect to take much off of your floor with this grinder although it does work great for knocking down high areas. I took about an 1/8" off when passing over a couple high spots but I would say the rest of the floor I took off 1/16" (if that) after 10 passes.
The machine is very heavy and will definately take two guys to get it in/out of a truck. I added some additional weight to get a deeper cut by putting some landscaping pavers on top the machine. It's also probably a good idea to wear a mask when doing this.
You can see a few pics of my floor after grinding here:
http://www.garagejournal.com/forum/showthread.php?t=4217
The machine is very heavy and will definately take two guys to get it in/out of a truck. I added some additional weight to get a deeper cut by putting some landscaping pavers on top the machine. It's also probably a good idea to wear a mask when doing this.
You can see a few pics of my floor after grinding here:
http://www.garagejournal.com/forum/showthread.php?t=4217
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Hammerdown
Well-known member
The diamond inserts are the way to go. They are more aggressive and do a better job. Bajones gave good advice about adding weight to the machine to get more concrete off with each pass. Have patience and be prepared for some hard work.
bajones9181
Member
Really I didn't think it was very hard work. My garage is only 450 sq ft though. 10 passes took me about 4 hours and that included a couple beer breaks 
For me the most tedious part of the job was dealing with the dust.
For me the most tedious part of the job was dealing with the dust.bajones9181
Member
katit
Well-known member
I did it with stones and spent about 6 hours in 20x21 garage. No respirator necessary, I was prepared with respirator, etc.. But I've used shopvac together with grinder and there was very little dust.
After something like 5 passes and certain spots grinding there was still some place where black surface wasn't broken. I had 20 year old concrete and it was really hard to brake.
Definitely get diamond stones (they weren't available to me) and place some weight. That should help a little.
After something like 5 passes and certain spots grinding there was still some place where black surface wasn't broken. I had 20 year old concrete and it was really hard to brake.
Definitely get diamond stones (they weren't available to me) and place some weight. That should help a little.
katit
Well-known member
tubeman said:
Yes. I would even think vodka shots if I had 50x80
