Model # HD-AWD40

Internet #202884364

Store SKU #140029

RIDGID 4 in. Double Row Diamond Cup Wheel
0850650001748

RIDGID

4 in. Double Row Diamond Cup Wheel

  • Works for wet and dry applications
  • Delivers 15,000 RPM
  • Ideal for leveling, removing coating and grinding concrete
$39.97 /each

Frequently Bought Together

Product Overview

Use the RIDGID 4 in. Double Row Diamond Cup Wheel for leveling, removing coating and grinding concrete. This wheel's double-row segment design provides aggressive grinding. This wheel fits small angle grinders and is suitable for both dry and wet use.

  • For small angle grinders
  • 5/8 in. - 11 mm threaded arbor
  • Double-row segment design for aggressive grinding
  • Suitable for leveling, removing coating and grinding concrete
  • 15,000 RPM maximum

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Customer Questions & Answers

24 Questions72 Answers

Customer Questions & Answers

4 in. Double Row Diamond Cup Wheel
4 in. Double Row Diamond Cup Wheel

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12 answers

Can I wet grind concrete with the Rigid diamond cup wheel?

This question is from 4 in. Double Row Diamond Cup Wheel
Asked by
MT
Tijeras
November 9, 2012
I need to grind down a hump in my concrete floor and want to minimize dust.
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Answers (12)

Asked by
South Weber, UT
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January 16, 2016
Answer: 
Works great with water. I suggest working small areas and stand a few 2x6 blocks around the area you are working to contain the wet muddy spray. This worked great for me and made cleanup a lot easier
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Asked by
Miami, Fl
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Home Improvement Profile: DIYer
June 11, 2015
Answer: 
Yes. Wet is the best way. You have to keep wetting it though, once you grind through the wet layer, it's dry underneath. Keep a small bucket of water handy. Be prepared for a mess.
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Asked by
Wethersfield, CT
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May 2, 2015
Answer: 
I used it grind wet and it did it worked.
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Asked by
Ga
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Home Improvement Profile: Professional
April 29, 2015
Answer: 
Yes you can. Although doesn't work as good on epoxy paint when wet. but concrete itself should be good to go.
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Asked by
California
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April 17, 2015
Answer: 
Yes you can, no problem at all.
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Asked by
American Fork, Utah
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October 28, 2014
Answer: 
I wet ground my whole 60ft of concrete countertops. it worked great, but must be very carful if you are using an electric grinder.
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Asked by
Plainfield, IL
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September 16, 2014
Answer: 
Yes, and I would recommend you do. The dry grinding is extremely messy!
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Asked by
Williamston, MI
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July 29, 2014
Answer: 
No, it will throw concrete mud all over you and the grinder and possibly electrocute you.
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Asked by
Woodstock, ON, Canada
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January 30, 2014
Answer: 
Yes you can just add water while you grind but in a way that water doesn't get the grinder all wet be carefull.
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Asked by
Woodstock, GA
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July 2, 2013
Answer: 
Yes, you can grind concrete wet with this wheel. Just make sure the water isn't puddling as it is hard to tell what you are working on....
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Asked by
Lakeland, FL, USA
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April 30, 2013
Answer: 
Yes, it works wet or dry
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Asked by
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November 14, 2012
Answer: 
Please contact Jore Corp at # 888-809-5673. This is not a product we support.
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10 answers

Can I use a 4" grinding wheel on a grinder designed for 4.5" wheels?

This question is from 4 in. Double Row Diamond Cup Wheel
Asked by
St. Louis
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June 29, 2014
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Answers (10)

Asked by
NH
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October 14, 2016
Answer: 
Yes, you just don't want to use wheels that are bigger than intended for your grinder.
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Asked by
Rancho Palos Verdes, CA
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October 4, 2016
Answer: 
Yes, it should be fine. I used it with my Makita 4.5 with great success.
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Asked by
Portland Or
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September 1, 2016
Answer: 
Yes, so long as your 4 inch grinder accepts discs with a 5/8 inch arbor.
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Asked by
Nashotah, WI
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September 26, 2015
Answer: 
Yes.
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Asked by
West Palm Beach
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May 12, 2015
Answer: 
Yes it will fit a 4.5 in grinder
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Asked by
Ga
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April 29, 2015
Answer: 
You should be fine as long as the wheel meets rpm requirements.
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Asked by
California
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April 17, 2015
Answer: 
Yes, as long as your grinding wheel can be mounted securely like your 4.5"
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Asked by
Plainfield, IL
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September 16, 2014
Answer: 
Yes you can. I used a 4" cement grinder on my Dewalt grinder with no issues.
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Asked by
Williamston, MI
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July 29, 2014
Answer: 
Yes with no problems. Just doesn't have as much surface area to work with.
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Asked by
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July 2, 2014
Answer: 
Thank you for your interest in RIDGID!
It is not recommended to use a smaller wheel on the grinder. We hope this helps!
Regards,
RIDGID
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5 answers

Can I attach this to a cordless drill?

This question is from 4 in. Double Row Diamond Cup Wheel
Asked by
Santa Monica, CA
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August 16, 2016
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Answers (5)

Asked by
NH
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October 14, 2016
Answer: 
I wouldn't think this would work well because a drill isn't fast enough. I think the wheel would be very difficult to control. Also you'd need to find some sort of arbor to adapt the 5/8"-11 thread to your drill chuck.
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Asked by
Rancho Palos Verdes, CA
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October 4, 2016
Answer: 
No. This is made for an angle grinder that has the correct fitting and much higher RPM than a drill.
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Asked by
Port St. Lucie, FL, USA
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August 17, 2016
Answer: 
This has a threaded arbor for a for a grinder. If an arbor/adapter to fit a drill was available (I am not aware of any currently available) it still would not be a good idea because the ergonomics differ so drastically between a drill and a grinder, it would be extremely difficulty to control safely and efficiently.
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Asked by
VA
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August 17, 2016
Answer: 
It is not meant for a cordless drill. Do you have an adapter? The center hole is threaded for a 5/8 grinder so you would need some type of adapter to screw it on to. Also, the rpms on a cordless drill will be less than a grinder but could still do light weight jobs I suppose. You can get a grinder from Home depot for $20... the adapter would probably cost you at least half that, if you could find one.
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August 16, 2016
Answer: 
No, this item can only be attached to angle grinders.
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5 answers

What is the minimum rpm's for this product?

This question is from 4 in. Double Row Diamond Cup Wheel
April 19, 2015
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Answers (5)

October 14, 2016
Answer: 
I'm not totally sure but I'd say you'd want around half what my grinder does minimum.. so around 7,000.
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Asked by
Nashotah, WI
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September 26, 2015
Answer: 
The RPM rating doesn't have a minimum, because the slower you go, the less stress you put on it. However, if you're going very slow (say, sub 5,000 RPMs), your work is going to take a LOT longer. It worked well for me at 12,000 RPMs. I'd say you want to be at 10,000+ for best results. This attachment is designed to take a little bit off at a time, but at a very high rate.
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Asked by
West Palm Beach
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May 12, 2015
Answer: 
For this product to work I recommend a minimum speed of 4000 rpm
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Asked by
Ga
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Home Improvement Profile: Professional
April 29, 2015
Answer: 
Which grinder do you have? I used the Ryobi 4.5'' grinder and handled it pretty well.
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Asked by
Read all my Q&A
April 21, 2015
Answer: 
Thank you for your interest in RIDGID!
There is not a minimum RPM, it really depends on the machine being used. But for safety purposes, product is rated for max RPM 13,000.
Regards,
RIDGID
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Customer Reviews

Rated 4.7 out of 5 by 57 reviewers.
Rated 5.0 out of 5.0 by Used this to remove the glue from my wood floor and to level the concrete. It worked great! After clearing the entire floor, the wheel looked and worked like Tim was new. October 25, 2016
Rated 5.0 out of 5.0 by Impressed and very happy with my purchase. I've been working on fixing my garage floor for weeks. It had large areas of bad pitting and some holes 2+ inches deep and 5 inches across. After getting holes and cracks filled I resurfaced much of the area with quikrete concrete resurfacer, but found this impossible to get down in a smooth layer, or feather the edges to less than a 1/8" lip. I rented a 10 inch concrete grinding machine from HD to smooth it out... The machine did ok but was very hard to control and see what was going on where you were grinding due to the slurry. I got about 2/3 done and the grinding disc was completely shot! I was astonished that I could do that in probably only 2-2.5 hours of actual use. 24hr rental was a waste. I didn't want to rent it again or pay for another disc as I imagine they would require.. So I gave this 4 inch wheel a go just to smooth out some trowel high spots and feather the edges of what was left. I prioritized what I was going to do because I figured this would wear out quickly. To my amazement, I'm nearly done smoothing out everything I could possibly want to and the disc is maybe 20-30% worn. This cuts down high trowel lines quickly, just be careful because it's easy to catch an edge and tilt the disc which will cut a groove quickly. Circular motions work well most places. Very light if any pressure. It can take some work and practice feathering your grind into the surrounding area smoothly. My floor is particularly tricky because it is an old suspended slab and has quite a bit of dishing going on. Anyway, this wheel has surpassed my expectations and I can't wait to see my floor completed with a nice coat of epoxy. The only downsides of this wheel are keeping it flat... and the huge clouds of dust you will make. You may want a dust shroud depending on your application, and you definitely want a good mask! October 14, 2016
Rated 5.0 out of 5.0 by Very impressed I tried this grinding wheel for the first time. I'm very impressed by the durability and speed at which it cuts. I used for about three hours to level some stucco and there is at least 1/2 the grinding pad thickness left. October 4, 2016
Rated 5.0 out of 5.0 by Exceptional Quality for the Price Decided to replace the carpet in the house with stained concrete slab. After pulling up the carpet edge battens, lots of nail divots that I had to fill, then grind level. Had a Makita 4.5" angle grinder, fitted this cup wheel to it, and it has performed for two days straight like a champ. (Was so impressed I went ahead and bought a 7" Ridgid Grinder and 7" wheel to do the "big stuff" out in the middle of the floor. Review of those upcoming). September 10, 2016
Rated 4.0 out of 5.0 by good item used and worked well for the project on a shower concrete floor July 26, 2016
Rated 5.0 out of 5.0 by Rip Roars! I used this to take thinset off of the floor after taking up our ceramic tile. I did wet the floor down but to be honest it still makes a mess for this but it did it quickly. I suggest doing a little research and remove the thinset another way or pay someone to take it off for you! I am sure this tool will work great on other things! June 28, 2016
Rated 5.0 out of 5.0 by Works great. Don't be a fool like me I bought this and was using it with my milwaukee angle grinder. I was moderately impressed initially. It was grinding at a pretty slow rate, and making a HUGE mess - both when used wet and dry. After hours of this I called it quits. A week or so later, I decided I was not happy with the results and needed to grind more. I purchased a dust collector attachment for my angle grinder online, and went back at it. Wow, the difference that made was incredible. Not only is there very minimal dust escaping into the basement, it cuts atleast 10 times faster. This is the only way to do it. April 29, 2016
Rated 5.0 out of 5.0 by Amazing It isnt cheap but it does the job correctly and quickly. Very easy to use. Highly recomend getting a dust shroud or it will make the biggest mess you can imagine. June 20, 2016
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