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Your cart is empty.DEWALT DW4777 5" XP Double Row Diamond Cup Wheel; High Diamond concentration for long life and aggressive material removal. Features large grinding segments with heat treated steel bodies which provides increases durability and wheel life. Diameter 5", Arbor diameter 5/8 - 11", Max RPM 12,200. Designed for General Purpose masonry grinding; dry grinding of concrete and other masonry materials, and for smoothing of uneven surfaces.
Jsteele
Reviewed in the United States on July 15, 2023
Chews up concrete. I’d suggest a shroud.
Ryan
Reviewed in Canada on July 10, 2022
Used it for finishing edges and tight to reach spots after floor grinding before finish.
V. Richie
Reviewed in the United States on October 21, 2022
This thing really bites in. If you have a decent grinder, this thing really puts in some work, and surprisingly, holds up VERY well. I expected it to degrade quickly, but it didn't.One warning though: if you are grinding concrete, dust mitigation is a serious problem, so think well ahead. You will be washing down everything within a 100ft radius of this thing when you are finished.
Joe - the $100/hr Product Consultant
Reviewed in the United States on November 1, 2021
These work well. I am grinding cement floor. Some parts of the floor had thinset from previous ceramic tile install. I used a rotary hammer, and a broom, to remove most of the thinset. Other parts of the floor just had some paint and carpet glue. I am using the grinder on approximately 2100 square feet. One of these lasts me about 400 square feet. I notice that on the Dewalt 5 inch grinder that if I turn down the RPMs to the the 2.8 to about the 3.5 range it works very well. It seems like going full throttle at the highest setting is not necessary (for my project). Toning it down makes it last longer! I also used a DW4777T with with slanted teeth, which did not seem to last as long. But, I did run the T model full throttle! But both products seem to work well for preparing my cement floor for a new tile install.
Yvon N.
Reviewed in Canada on December 12, 2018
Good
Wojo
Reviewed in the United States on November 29, 2018
This style wheel with concentric rings gives good performance and long life when grinding surfaces flat. The edge of the wheel works to grind into the adjacent surface as the tool and wheel are moved side-to-side. (Wheels with turbine vanes tend to be aggressive at taking down material but also tend to wear faster.) The edge of the wheel limits the amount of material that can be ground-away in a pass.The 5" diameter wheel needs a reasonably powerful grinder to drive it without spinning too fast. Match the RPM ratings.This type of grinding can create a great deal of noise, flying debris and dust. Dust can be reduced by keeping the surface wet with flowing water. Eye and hearing protection for anyone in the area are a must.
Client d'
Reviewed in Canada on October 18, 2018
Bon rendement. Coût moindre.
Customer
Reviewed in the United States on September 9, 2016
After giving up on finding a better machine to resurface our concrete slab, we finally bought an angle grinder with dust shroud and this cup. We were very pleased with how well it worked and how long it lasted.
Anthony Le
Reviewed in the United States on June 14, 2015
Well made. Aggressive! Help reducing time taking off thinset in any area. Combined this wheel with a good VS grinder, with a dust shroud a decent vacuum ... Made my jobs easy and stress free! Will do the same for anyone, I think!
Kat
Reviewed in the United States on June 12, 2015
Takes off thinset without the slightest hesitation. Durability is average. Nothing to write home about.Common knowledge but, make sure to keep the wheel completely flat on the surface you are removing thinset from. If you don't you can gouge the concrete very quickly.
Rhino-Mite
Reviewed in the United States on January 17, 2014
Grinds concrete almost too good. You don't need the special vac adapter grinder, but it does make a difference when you are working inside for dust collection. It will fit a regular grinder, but beware of the flying chips and dust.
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