cup wheel difference

[Dave Maxwell]

Is there much of a difference in the final finish between these two?

Using the blue one now.

 

[pauls_workshop]

Dave, you tell us!

I would think the single row might have more tendency to dig in and not grind flat as easily. I used the top yellow Dewalt one, with the double rows. Even 4.5" , that can grind flat to the floor easily, with minimal tendency to dig in on the edges. - Paul

 

[bigbadktm]

should be different grits listed. I believe the bottom one is called a turbo cup. Both work very well for prepping a surface to be coated. As far as which one works better....that all depends on the concrete itself.

 

[86TURBOBUICK]

I used the Blue one last week to level the perimiter of the garage as well as level some uneve cracks prior to epoxy crack repair. If you are looking to prep the surface you want to use a dimabrush. http://www.homedepot.com/p/Diamabru...i_kw=&ci_gpa=pla&ci_src=17588969#.UlQcSdI3vD4

 

[Andrew LB]

I recently used the $39 diamond cup wheel made by Ridgid that HD sells and it did a fantastic job grinding down my garage floor. If the surface is slightly damp, these diamond cup wheels do a fantastic job of removing concrete. Dust is the big problem with grinding a concrete floor. If you do not have a full shroud for your grinder that attaches to a vacuum, you'll be in for the dirtiest experience of your life. I used a homemade grinder shroud hooked up to a water filtration device to remove most of the dust, then that gets sucked into my Ridgid 14gallon 6hp vacuum with a drywall filter bag AND a hepa cartridge filter because that fine dust can pass through the collection bag and regular paper filters.

And that fine concrete dust is full of silica and if you don't wear a respirator, it can shred your lungs and possibly kill you. A few years back a friend used his brothers blast cabinet without telling him, and assumed it was safe as long as the vacuum was attached and running. Big mistake! By the next morning he was coughing up blood and his lungs were filling with fluid. They got him to the ER and he managed to live through it. So the moral of that story that even if you can't see particulate... don't skimp on protection.

 

[shaun oriold1]

My take on the cup wheels is that the more segments there are, the more the weight of the grinder ( or how much you push down) will be spread out. 10 segment heads will be more agressive than 20. So I would peg the top yellow disk to be a smoother grind if the grits are equal.

Though, really the only way to tell has already been suggested, in that you tell us.

Shaun.

 

[Dave Maxwell]

Won't be buying another one. Just want the roughest finish possible for the epoxy to bite. Thought maybe someone had used both

 

[Edger]

You will not notice much difference however the double row (the blue one is called turbo) will probably cut faster because there are more diamonds cutting.

If they are both the same grit then the finish (roughness) will be the same, if the concrete is a bit soft the yellow double row can leave more ring marks while the blue will leave less.

 

[Dave Maxwell]

Never been able to find a grit rating on my blue one. Just advertises smooth finish

 

[Edger]

They are mostly around 30/40 grit unless marked. General purpose grinding wheels seldom have the grit marked on them. It is kind of like a sausage, you never know what is in them.

 

[LegacyIndustrial]

I recently used the $39 diamond cup wheel made by Ridgid that HD sells and it did a fantastic job grinding down my garage floor. If the surface is slightly damp, these diamond cup wheels do a fantastic job of removing concrete. Dust is the big problem with grinding a concrete floor. If you do not have a full shroud for your grinder that attaches to a vacuum, you'll be in for the dirtiest experience of your life. I used a homemade grinder shroud hooked up to a water filtration device to remove most of the dust, then that gets sucked into my Ridgid 14gallon 6hp vacuum with a drywall filter bag AND a hepa cartridge filter because that fine dust can pass through the collection bag and regular paper filters.

And that fine concrete dust is full of silica and if you don't wear a respirator, it can shred your lungs and possibly kill you. A few years back a friend used his brothers blast cabinet without telling him, and assumed it was safe as long as the vacuum was attached and running. Big mistake! By the next morning he was coughing up blood and his lungs were filling with fluid. They got him to the ER and he managed to live through it. So the moral of that story that even if you can't see particulate... don't skimp on protection.

The long term injury is called silicosis. It is similar to a black lung disease.

 

[Dave Maxwell]

Hope my dust mask is enough. Thick white 3 m one

 

[pauls_workshop]

Hope my dust mask is enough. Thick white 3 m one

Dave, best to use a real respirator when doing any cement grinding. 3M makes some not too expensive. The little white masks aren't very good. A real respirator with filter built in is 200% better. Worth the money to buy one. - Paul

 

[Dave Maxwell]

Great. I have been grinding close to 100 hours with that mask. Have a paint respirator with charcoal filters that need replaced. Lol