|Item Weight||1.6 ounces|
|Product Dimensions||5 x 4.5 x 4 inches|
|Item model number||DW4774|
|Is Discontinued By Manufacturer||No|
|Item Package Quantity||1|
|Warranty Description||30 Day Money Back Guarantee|
DEWALT Grinding Wheel, Double Row, Diamond Cup, 4-1/2-Inch (DW4774)
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- Extended performance diamond matrix provides 350x's the life of conventional abrasives and aggressive material removal
- Large Grinding segments with heat treated steel bodies which provides increases durability and wheel life
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From the manufacturer
DEWALT DW4774 4-1/2-Inch Double-Row Diamond-Cup Grinding-Wheel
- High Diamond concentration for long life and aggressive material removal.
- Large Grinding segments with heat treated steel bodies which provides increases durability and wheel life.
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From the Manufacturer
DEWALT Diamond Cup Wheels are designed to be used for dry grinding of concrete and other masonry materials to smooth uneven surfaces and remove flashing. The diamond matrix provides 350x's the life of conventional abrasives and allows for more aggressive material removal. A double row of diamonds rims on these blades provides for heavy material removal and provides longer life. This 4 1/2" wheel with double rim and 5/8-11 arbor can be used on many small and large grinders.
Top reviews from the United States
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DeWalt DW4774 4-1/2" Double Row:
This blade seemed to be the best of the bunch, but at thirty-five dollars, we question whether or not it was noticeably superior enough to justify the cost. As to durability, we finished the last 200 square feet of the project with this blade and it was still going strong which might be the justification for the price.
OCR 4" Concrete Turbo Diamond Grinding Cup Wheel Three Row....:
This wheel did very well and for the lower priced group lasted just shy of the 4" Diamond Segment Grinding Cup Wheel Disc... (Blue version).
It ultimately lasted for about 300 square feet.
4" Diamond Segment Grinding Cup Wheel Disc... (Blue version):
We liked this one the best of the inexpensive group (and have ordered extras). It consistently got about 350 square feet and seemed to wear out evenly. A really good buy for the dollar.
Whirlwind USA GPST 4.5" Heavy Duty Grinding Cup Wheel:
This was the most expensive of the group and at first we were very disappointed in it. After using it for a while though, we came to realize it is better suited for polishing work rather than fast removal of large amounts of material. It did not seem to wear much at all for the work it did and we will look forward to using it when we need to provide a smooth finished surface. For just grinding, don't pay the high price, it is definitely not worth it.
4" Diamond Segment Double Row Grinding Cup Wheel Disc.... (Black Version):
This was the least competent of the bunch. It worked reasonably well but only lasted for about 200 square feet. At the end, it literally lost all of its teeth and was just a smooth flat wheel. The others in the twelve dollar range were much better buys.
In summary, we feel that if you are only going to grind a smaller area of concrete (or like material) and it is not a massive project like ours, the inexpensive blades are a great buy and do just as good a job, if not better.
This last picture shows what the walkway looked like before grinding and what I was working towards accomplishing.
Imagine starting your project with a older home, 12 x 12 lino tiles covering dark blue paint. I can tell you the blue is gone. I would strongly suggest a DEWALT DWE46152 Surface Grinding Dust Shroud, 5-Inch to control the dust. This grinder makes old cement look close to the fine powder form it was in when it was first mixed.
Extremely satisfied, I couldn't have asked for better.
The grinder technique requires alot less muscle and vibrating of the house, and is THE way to go in my opinion especially for 50sq ft+. A dremel might be better for less.
For all the techniques regardless, it is necessary to set up plasting sheeting with a plan for a fan, dust exhaust, clean air intake, respirator and eye protection. Its not exactly an easy task.
P.S. the lady of the house actually did all the work
The 4-1/2" diameter wheel can be used on most grinders and can spin to high RPM. Match the RPM ratings. Using this wheel on DeWalt's new FlexVolt grinder makes for a very flexible cord-free grinding tool. We have been using this setup for years with the same FlexVolt grinder!
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.
Top reviews from other countries
Doesn't do a really smooth job on concrete, but I might buy a finer one to clean it up a bit after.
Cleaned up my shop floor and more. Looks great now. about 2hrs of grinding. bit tough on the knees.
When I was done, the disk was hardly even worn. I "could have" used it for another ten cement decks. I say "could have", but I won't, since I will probably throw the wheel away. Here is why: during the process of sanding, I believe that the wheel somehow became slightly unbalanced due to uneven wear. This caused a slight vibration to appear, which I ignored and continued. Then suddenly... !!PING!! - the wheel goes flying like a frisbee (thankfully in the opposite direction from me) and landed on the lawn. It snapped the auger (shaft) of my beautifully powered 8.5 Amp grinder :( Luckily I only had approx. 10 more minutes of deck grinding in obscure places like the sides of three steps going down to the yard. So I called it a success anyway, and quit for the day after almost five hours non-stop grinding.
I have not been able to match the power of my existing grinder on my budget, and settled for one 6 amp and one 7 amp as replacements (I now wanted a spare grinder in the house). I briefly tried the same wheel on the new grinders, and they vibrate too. So I am guessing that using this wheel on the new grinders will only end up snapping those shafts also.
All in all, great product. Will definitely purchase more if needed.