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-   -   Dado in concrete? (http://www.diychatroom.com/f29/dado-concrete-127447/)

Zellarman 12-22-2011 11:33 PM

Dado in concrete?
 
I'm trying to put grooves in concrete, about 1/4" x 1/4", a Dado blade would be perfect, if they were only made for concrete. It might even work, but they're too expensive, and wouldn't last long enough (I'm looking to make many grooves). I also thought the abrasive type of blades stacked up to get the desired thickness might be good, only it would require constant readjustment to keep the grooves at the desired depth since that type of blade wears away. Can anybody make a better suggestion?

Bondo 12-23-2011 06:06 AM

Quote:

I also thought the abrasive type of blades stacked up to get the desired thickness might be good, only it would require constant readjustment to keep the grooves at the desired depth since that type of blade wears away. Can anybody make a better suggestion?
Ayuh,.... Use a Diamond blade...

Daniel Holzman 12-23-2011 08:04 AM

Do not stack blades, use a diamond blade as previously suggested, and make two passes using a saw guide. My diamond blade is about 1/8 inch diameter, so two passes makes 1/4 inch.

jomama45 12-23-2011 09:33 AM

Buy a diamond "tuckpointing" blade for a grinder or circular saw. No need to worry about consistency with one of these, and it should be around .220" thick, which will create about a 1/4" width by the time you run it through. You should be able to find a 4.5" blade for less than $50.........

Bud Cline 12-23-2011 09:49 AM

There are also segmented "crack chaser" blades available that are thicker than a typical diamond saw blade.

Zellarman 12-24-2011 12:16 AM

Thanks Joemama and bud, looks like I'll be going that route. Will post my results.

12/30/2011 update - purchased a relatively inexpensive tuck pointing blade on eBay to fit my circular saw, and it worked perfectly, it cut fairly easily and looks as if the blade should last a reasonably long enough time

Thanks again for the suggestion


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