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Unread 01-28-2009, 03:04 PM   #16
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George---thanks for the information. I assume you rented one of these and was it the first time you used one? Is it very hard to use?

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Unread 01-29-2009, 12:41 PM   #17
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I use a diamond "cup wheel" on an angle grinder for the purpose, GB. I assure you it's not gonna "only polish the surface."

And it doesn't really take long to rough up a pretty large area. Dust is the biggest drawback, but ain't nobody promised you easy, eh?

My opinion; worth price charged.

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Unread 01-29-2009, 05:45 PM   #18
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I bought the scarifier on e-bay. I'm finished with it now and I will eventually get around to selling it. No it was not hard to use, but it was not an easy job (1300 sq. ft.). I still had to use an angle grinder near the walls where the machine would not reach. I tried to use a rented dual disk electric concrete grinder. Four hours later I had removed maybe a 1/32" from about 10 sq. ft.
I was not impressed. The dual disk grinder came with new diamond blocks on it too.

The electric scarifier definitely roughed up the surface of my sealed concrete basement floor. I vented the dust to the outside and the dust cloud looked like the house was on fire I was also able to take down some high spots on the slab using the scarifier.

The angle iron rails in the picture are not necessary, but were part of an experiment to precision level a high spot. It was easier to just grind back and forth in multiple directions in order to take down the high spot.
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Unread 01-29-2009, 06:48 PM   #19
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George, they have child labor laws! Well, at least he's properly protected with the glasses/gloves/ ear muffs....

I use this Bosch 1773 concrete surface grinder. When hooked up to a decent shop vac with a fine filter, there's practically zero dust. Like mentioned, it doesn't take much time at all. The HD's around here used to rent them, but stopped. It would be worth a call to your local HD's.
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Unread 01-30-2009, 10:01 AM   #20
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Thank you all for all the great info! I really appreciate it!
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