Concrete vs. Milwaukee M18 Cordless Angle Grinder | 3 Tips on Grinding and Polishing Concrete
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- Опубликовано: 18 май 2020
- Today, we are using the Milwaukee M18 Cordless Angle Grinder with a 4 1/2" Makita Turbo 8 Segment Diamond Cup Wheel ($45) to grind and polish concrete.
We have about a 1/2" of concrete to level-off on a sidewalk. Let's see how long this takes and if the Milwaukee M18 cordless can handle the job of grinding this much concrete.
Watch the video for my 3 tips when you try to grind concrete with the Milwaukee battery-operated grinder.
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Needed a dust shroud and a respirator! Do it right and Dont mess around with silica dust!
Definitely need a certified respirator when dry grinding concrete. Silica dust will literally shred your lungs.
Thanks for video brother. I would encourage you to get a better filter system for the sake of your lungs. It is really bad. Wife's 23 y/o cousin died in ER after doing a tile job for her mom. The docs said she had breathed in the dust and it destroyed her lungs.
Your comment may have saved lives. My husband was going to wear a disposable blue mask but because of your comment wore an industrial safety mask and goggles. Even so, when he saw the cloud of dust hanging in the air, he said he was done with this tool for good. Thanks for the tip!
@@readysetsuccess wow. Thank you.
Funniest thing you said! It doesn't require a permit. If you are anywhere else in the country, no one would ever think Permit. That shows how ridiculous California is.
Can anybody please let me know how much surface area can be covered using this 4 1/2" dia cup wheel for about 2-2.5" thick concrete?
Did you have to take gaurd off, or just dont use it?
No shroud, respirator or vacuum for silica dust? Maybe try to rough surface to stop slippery surface when wet.
I have this grinder, I think you were underplaying the battery issue. I tried grinding a 2 car garage floor to prep for epoxy, and it ate through the batteries and overheated like hell. In the end I got a cheap Dewalt with a power cord to finish the job. The cordless did about 10% of the job. Lithium batteries are not up to the tough jobs that grinders go through. For small jobs this model is ok, anything tough then use a corded model.
Battery grinders are great but you should not be using one for a whole floor. I have a dewalt 60v battery grinder and it has a 2300 watt output while the most you could ever get out of a corded grinder is 1700 watts of power. It eats through 9 amp hour batteries quickly but not faster than i can recharge them.
I think it should be noted that he is using very low pressure when grinding. He takes half an hour skimming down a bit over a quarter inch. Cordless grinders won’t overheat if they are used with a *very* light touch.
NICE. I almost went and rented out a massive grinder from homedepot for $149 for four hours. So i guess my grinder does have some use afterall. thanks.
Awesome video!! Thanks!!
I have a 2'x2' slab of concrete that I need to grind down about 2-3".... Based on your experience, is that a good blade for that, and how long do you think it might take?
Thanks!!
A bigger blade would be better. It would take a long time to do it with the blade Jordan used as 2" is a lot of concrete to remove. Jordan only removed 1/4" to 1/2" and that took him an hour.
Should get the shroud and Shop vac for the dust
I'm glad it works for you, it's funny though, that's probably a good $400 of equipment you used whereas the rental was $170 for 4 hrs. Granted you already had the equipment so it didn't cost anything but the $40 for the disc.
at the time of this video 2 years ago, grinding cup was $45, today is $65, 44% increase, what was the oficial inflation index?
Dude, nice. I like your way of thinking. Would have been a major cost to either redo the concrete or float it up back to level. Great work!
I finally clicked on this video and it was interesting.
Is there some reason you can't use water to keep the dust down? I see people wet grinding with larger grinders. Can't figure out why I'm not seeing any videos of hand grinders being used with water. I want to do this to level a high spot in my bathroom before laying LVP.
Good question. I was wondering the same - did you figure out an answer from somewhere yet?
@@Nettle314 No...but my guess is that you can. It's probably a very messy process though.
Have you tried it with water yet?
To control all dust and keep cool
I am curious too. Thanks for the video. I am looking into doing the same thing. However, I might run a long cord instead.
I would do the same too😊
The only issue with using water while grinding is sludge. It will be a mess. And worse if you have a hepa vacuum attached. Dry grinding with a good mask and good vacuum, & ventilation is the way to go.
You don't need to use water ?
Is it safe to use without a guard?
I haven't seen the concrete grinder used with a shield. Felt safe to me and I bumped it a few times.
Why not use water and stop all that dust better for you and grinder.
That should have been tip #1. I should have sprayed it down. Thanks for the comment, Jordan
That dust is soooooo bad for your lungs.
An hour to grind that much seems like a very long time... Maybe need a better grinder/blade?
They have this guy worrying about a sidewalk lip where ppl s!ht on the street all over LA, SF.
Setup by my employer worry everyday I will die from silicosis from drilling into concrete the dust is fatal with no hope please spread awareness.
if this post is genuine why don't you contact an attorney to sue the pants off them for violating OSHA industry compliance requirements. I don't know the exact type or to what extent of concrete drilling you referred to, but it sounded substantial and significant. If it is, well- It became official a few years back, google it, that concrete grinders are to be equipped with dust shrouds / dust removal systems. Masks/respirators are also pretty common sense, but- alone, aren't up to task without the aforementioned. Look for another employer but don't quit ur current one - not yet. Once you've actually gotten HIRED by your replacement workplace, sue ur current one, and have no regrets. Remember you really have nothing to lose, _except your life_ . *Isn't that enough ?*
Use water! And use a mask!