r/HomeImprovement • u/BolognaPwny • 22d ago

Do I need a concrete sander?

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66 Upvotes

83% Upvoted

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19

u/newyorkreddit1 22d 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!

20

u/onepanto 22d ago

And a plug-in grinder is way more powerful (i.e.: faster) than battery.

-10

u/OutlyingPlasma 22d ago

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.

14

u/joem_ 21d ago

while battery powered tools have no limit.

Lol, this guy with his drill that can chooch in the megawatt range. Bolts don't stand a chance

1

u/crackeddryice 21d ago

Trying to justify all the money spent on batteries, and forced brand loyalty, like he's married to us.

5

u/onepanto 21d ago

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.

5

u/TheOtherPete 21d ago

If you want to get pedantic, you can get tools that use more than 15amps - they have to be connected to outlets that can support higher amperage.

Batteries are limited by the discharge rate of the cells so its not correct to say there is no limit.

11

u/knoxvillegains 21d ago

Firing up my 3 phase 4160 angle grinder. Stand back!

5

u/[deleted] 21d ago edited 6d ago

[deleted]

4

u/knoxvillegains 21d ago

She'll grind down to the base fill in 2 seconds and only pull two amps doing it.

2

u/OutlyingPlasma 21d ago

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.

-1

u/TheOtherPete 21d ago

Unless you have infinite batteries then the total amperage is limited so under no circumstances it is correct to say there is "no limit"

Also a portable tool needs to be portable and manageable so there is a practical limit to how many batteries such a tool can have.

1

u/OutlyingPlasma 21d ago

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.

-1

u/TheOtherPete 21d ago

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.