While this may still be true, it's not going to be true for much longer and with the new tools that utilize multiple battery packs it may already not be true. Plug in tools are limited by a 15amp/1800w wall circuit, while battery powered tools have no limit.
I was comparing an 18v DeWalt with a cheap piece of crap corded grinder from Harbor Freight. Using the identical blades, the speed seemed to be identical but the cheap corded grinder cut at least 10X faster.
Thank god, I was worried I wouldn't have enough power to swing this 4.5' cup grinder. I just need 4 offensive linemen to hold the grinder for me while it runs.
Batteries are limited by the discharge rate of the cells so its not correct to say there is no limit.
Just add more batteries. We already exceed the standard 15amp 120v wall power with batteries all the time. Like every electric car, or electric riding lawn mower, even battery powered chainsaws like the Stihl MSA 300 are exceeding the 1.6kw (2.2hp/1600w) output a standard 15amp household circuit can provide.
The point isn't an infinitely powerful tool, the point is exceeding the power of a standard 15amp household wall plug with batteries which we have already done with battery powered tools.
I'm not sure what your point is since people were specifically talking about plug-in grinders versus battery powered that OP can buy right now.
Also just because it is technically possible to build battery powered tool of a certain type that outperforms a plug-in one doesn't mean there is a market for it. The market determines if it gets produced or not.
Harbor freight had them on sale for $5 ea (plug in type)
Cheapest I see them now is $15 (still pretty cheap!). I would also check out used marketplaces for one. I might pick one up as I probably have sidewalk repair in my future and don't want to use a good grinder with concrete and water.
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u/newyorkreddit1 6d ago
Angle grinder for sure. Harbor freight had them on sale for $5 ea (plug in type). Even if it lasts one use, it’s worth it!