Rotex to smooth rough concrete?

[bwehman]

Hey all! I have a small 4" x 20" section of rough concrete I'd like to smooth down. Is RO150 and Sapphir up to the challenge? Anybody do this and have feedback?

 

[Frank-Jan]

No, that's more a job for a diamant cup disc on an angle grinder.

 

[andygiddings]

No, that's more a job for a diamant cup disc on an angle grinder.

With a lot of dust collection and a mask unless you enjoy eating concrete

 

[Hugh]

I did take my Rotex 150 to the concrete floor in my kitchen, it was more so take off the drips and gunk dropped by the builders but it did a good job taking out any concrete lumps.  I wasn't realy going for smooth just flat enough to lay laminate floor over.

The rotex collected more of the dust than going over it with a hoover!!

It may well work but its going to eat sandpaper.

 

[Sparktrician]

No, that's more a job for a diamant cup disc on an angle grinder.

Concur 100%.  There are housings for angle grinders that have dust extraction, too, found on Amazon.com.  I used this setup in my basement to take down some spills of hydraulic cement left by the HVAC techs used by the previous homeowners.  The concrete destroyed any abrasive discs on my RO 125 and RAS 115.4, but the diamond disc in the angle grinder was unstoppable. 

 

[AlexThePalex]

I have tried on a couple of occasions to smooth out concrete with Saphir paper on the Rotex. It's an exercise in futility.

 

[Holmz]

No, that's more a job for a diamant cup disc on an angle grinder.

[thumbs up]

I tried a plastic shroud that clamps on, and is 80% effective, but still sprays dust everywhere. It was ~25-40$ from braxton-Bragg I think???

Braxton-Bragg also have other media for concrete which are less intensive than a turbo cup, and good for smoothing after grinding. (Or instead of grinding). They use more of a polisher type of machine speed, but still poke along plenty quick for that small area. Talon is one brand that comes to mind.

What is the nature of it? 1:4" removal? Smoothing? Etc?

 

[Cheese]

I tried a plastic shroud that clamps on, and is 80% effective, but still sprays dust everywhere. It was ~25-40$ from braxton-Bragg I think???

Braxton-Bragg also have other media for concrete which are less intensive than a turbo cup, and good for smoothing after grinding. (Or instead of grinding).

Braxton-Bragg is an excellent source for cement/stone accessories.  [cool]  High recommend. 

 

[fignewton]

In the the past, I used my Fein Multimaster with the rasp head on it to level concrete at a doorway for a threshhold.  Worked really well, but is tough on the head.  Dust wasn't too bad either, as it didn't want to throw it everywhere.

 

[Nat X]

I grid the fines off of cast GFRC panels with a Rotex all the time and it works great, but I'm just trying to take off a few microns for aesthetics and not resurfacing a craggy or spalted floor with lots of aggregate in it.

 

[bwehman]

Can the RAS 115 accept cup discs for such a purpose as this?

 

[Nat X]

Can the RAS 115 accept cup discs for such a purpose as this?

I don't know if it'll fit on the arbor or not, but even if it will, that's a lot more weight than the motor was designed to spin, and the dust shroud will become utterly worthless. Given the choice between potentially wrecking a $500 tool and just buying a $50 one, I'd probably opt for the latter.

 

[bwehman]

Logic checks out, thanks mate. I just ended up getting a DeWalt grinder, BUT got a black systainer to feel better about the whole experience lol.

 

[rst]

If you would need a tool comparable to Festool, I bought the Metabo WE 15-125 HD SET GED for grinding down concrete thresholds as I install steel and aluminum commercial entrances.  I use an old Sears vac for extraction (not using my Feins and Festool vacs for this!!) and the combo keeps the dust to a tolerable level.